Exact pregnancy period by week. Pregnancy dates: obstetric and embryonic - how to determine and not get confused about the dates. Such a familiar and promising ultrasound

Online calculator pregnancy will help you calculate the duration of pregnancy, determine the expected date of birth, calculate the age of the fetus, find out when the end of the first and second trimester will occur. The pregnancy calculator is a free service. Depending on the individual organism, some data may not match.

Each pregnant woman keeps her own calendar, where she records all the changes that happen to her during pregnancy. However, the modern pace and a lot of worries about the family do not always allow you to track on your own which week of pregnancy is going on and how the baby should develop. A pregnancy calendar comes to the aid of busy mothers: this Full description all the changes occurring at this stage with mother and baby. Thanks to this, a woman can easily track how much the baby weighs, what she should feel, and what problems await her. But to find out how the child develops, you need to determine what stage of pregnancy a woman has.

First day of last menstruation:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 January February March April May June July August September October November December 2019 2 020 2021

Average cycle length (days):

22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

Calculation results

— Estimated date of conception

— Fetal age

- Gestational age

How to find out the time of conception?

Traditionally, to determine the current stage of pregnancy, a woman comes to antenatal clinic in the clinic. The doctor conducts an examination,, if necessary, prescribes an ultrasound and is guided by the last menstruation in setting the due date. Based on this date, a calculation is made of when the mother should give birth.

But it is worth warning women that such a calculation will not always tell you the exact day of birth. In medicine, there are two terms for determining pregnancy: obstetric and real. What is their difference?

The obstetric term helps determine when the pregnancy period began, based on the date of the last menstruation. In this case, the date of conception is not taken into account, since it is unknown to the doctor. The doctor proceeds from the idea of ​​a woman’s standard menstrual cycle, which lasts 28 days. Therefore, conception could occur during ovulation on the 14th day after the start of the cycle. It turns out that the difference between the obstetric period and the embryonic period is 2, or even 3 weeks.

You can find out the real period more accurately if you undergo an ultrasound. However, ultrasound is prescribed no earlier than 10-12 obstetric weeks, and the woman’s curiosity is much stronger.

How can you find out your gestational age yourself, so that you can later rely on the calendar?

To do this, it is advisable to know the date of conception or at least possible days when this could happen. If you can't set the date, you can use reusable pregnancy tests. The devices are equipped with sensors that determine the duration of pregnancy. The error of such devices is small.

You can calculate the gestational age yourself, based on the obstetric calculation method. But if this is difficult for you, an online calculator will come to the rescue. This is a program on the website that will itself calculate the approximate date of your ovulation and, therefore, the estimated date of conception.

How does the calculator work, and what is needed for it? You just need to enter the first one and last date menstruation. The online calculator will automatically calculate the midterm and determine the date of conception of your child.

If you know the date of conception, an online calculator will also help determine the timing of pregnancy. The principle of its operation will be different. You need to enter the date of conception into the calculator, and it will calculate the duration of pregnancy by week. This way you will know exactly what week it is on what dates, and you will be able to watch from the descriptions how your child grows.

When is the due date?

Now is the time to find out your due date. The same calculator that determined the date of conception will help you calculate the date of birth. Online calculations are made based on data on the date of conception or last menstruation. In the latter case, you will find out the due date based on the obstetric term.

If you know exactly how many weeks you are, you can guess at what point you can expect labor to begin. This usually occurs at 38-40 weeks. Some women reach 42 weeks: such a pregnancy is not considered post-term. It should also be taken into account that an error may have occurred in determining the gestational age. An online calculator can also make mistakes, since it makes calculations based on generally established observations. In addition, you could have entered inaccurate information into it.

Practice shows that the date of birth is the date of the start of the last menstruation, to which 9 months are added. On these dates we can expect a new addition to the family. But what to do if it is not possible to determine the period based on menstruation, since the woman no longer remembers the exact date?

HCG analysis

If a woman does not monitor the regularity of her cycle and does not remember the date of her last menstruation, the calendar is unlikely to help here. In this case, doctors recommend doing a blood test for hCG, a hormone that allows you to determine the presence of pregnancy even in the early stages.

HCG (human chorionic gonadotropin) is produced in a woman only during pregnancy with the fertilized egg. A biochemical blood test can determine its amount in the body and, based on this, determine the presence and duration of pregnancy. The most informative are the first 12 weeks of pregnancy, when hCG levels are still high. Gradually it begins to decrease, and a blood test will no longer provide reliable data.

Approximate size ovum, and according to it, what is the current stage of pregnancy, the doctor will be able to do when examining the vagina and during palpation.

Why do you need to know the exact date?

Not all women are attentive to their pregnancy and calculate the period by week. They think that calculating the gestational age is the doctor’s task in order to subsequently calculate the due date. During pregnancy, they do not think about how many weeks they are now and how the baby should develop.

In vain, since no one can determine better than the mother herself whether the baby is comfortable inside. Dangers await a pregnant woman at every step, and it is better if she knows her due date week by week. A calculator and calendar can help with this, so you don’t have to contact your doctor every time.

If you don't know how many weeks pregnant you are, open the calculator on the website, enter the required data, and you will get the answer. It will help you remember your doctor’s recommendations and protect yourself and your baby from possible complications. Isn’t it nice to see in photos and videos how your baby grows week by week? After all, you can only look inside with the help of an ultrasound, but this only happens three times during the entire pregnancy.

The need to undergo screenings is another reason why a woman needs to know the exact duration of her pregnancy. Studies, including blood tests for genetics and ultrasound, are carried out within a strictly defined time frame. If you do the analysis earlier or later, you may get an inaccurate answer.

Do not neglect calculating the gestational age by week. This will give the woman valuable material to determine whether the baby is developing according to the norm, whether there are any deviations, and what studies still need to be done.

What errors are possible?

Unfortunately, if the exact date of conception is unknown, any pregnancy calendar by week or conception calculator may be inaccurate. The baby’s development calendar is based on the data that was determined initially. What if they are incorrect?

Unfortunately, errors cannot be avoided. According to statistics, in almost 20% of women during pregnancy, the difference between the obstetric and embryonic periods is 14 days. If a woman's cycle is long, for example, 35 days instead of 28 days, ovulation may occur only on day 21. Consequently, the difference between the obstetric term and the real one will be even greater. 1 week of embryonic period will be equal to 5 or 6 obstetric weeks.

But there is also an error in setting the embryonic period. It lasts several days, since sperm can remain in a woman’s body for 3 days, so fertilization could occur not on the day of ovulation, but later.

Calculating the gestational age is a painstaking task. Not always a calculator or even a medical analysis can give an accurate answer. A woman should listen to her own feelings: they will help her find out by feeling what the current stage of pregnancy is, and how correctly the doctor has determined it.

In order not to miss the fact of pregnancy and to know exactly when fertilization occurred, a woman should be attentive to the signals of her own body and conduct regular monitoring of her health. To do this, you need to keep a calendar where the start and end dates of menstruation, facts of suspicious vaginal discharge (if any) will be recorded. This will allow you to detect the onset of the disease in time and avoid consequences for yourself and the child.

To be healthy and give birth to a healthy baby, a woman must be attentive to herself. The calculator on the website and the pregnancy calendar will help her with this!

See also:

Express tour: pregnancy week by week

Pregnancy women lasts 280 days or 40 weeks, which is 9 months. This difficult path to meeting mother and baby is usually divided into trimesters, each a week which has its own characteristics and characteristics. Each trimester consists of three months.

First trimester: weeks 1-13

At the “start” after conception, an embryo is formed, but the signs are barely noticeable by the mother. Details:

• 1 Week— for pregnancy to occur, it is necessary to attach an egg traveling through the tubes to the wall of the uterus. The expectant mother feels the world more deeply and becomes more thoughtful. Many women at this stage feel symptoms like before menstruation - pulling in the lower back, aching in the stomach. To determine the length of pregnancy in weeks and calculate the date of delivery based on the last menstrual days, use our pregnancy calculator. Try not to take pills and eat right;
• 2 week- a follicle matures in the ovaries during ovulation, then it bursts, the egg comes out, the breasts become sensitive, irritability increases slightly, but libido also increases. No saunas or steam baths during this period! No heavy lifting! Only exercise, swimming, quitting smoking, orange juices and green vegetables rich in folic acid, which helps absorb iron! Taste habits change, you often want to go to the toilet, your blood pressure decreases;
• 3 week- the embryo lives in the mother’s body, the egg is fertilized by a sperm, divides, and after 2.5 weeks reaches the uterus, which by the end of this period becomes loose. Nothing prevents the egg from reliably attaching to the mucous membrane. The metabolism changes, the mammary glands become coarser. You need to replace sweets with nuts, eat foods rich in calcium, proteins, folic acid, iron;
• 4 week- the mother detects a delay in menstruation, nausea and malaise may appear. Hormones released during pregnancy can already be seen in the urine during laboratory analysis. The embryo develops internal organs, mom needs vitamins;
• 5 week- the uterus thickens, the baby looks like a tadpole, but its eyes and nostrils are already formed, it already has a heart, and the base of the skeleton is formed. The baby receives nutrition and oxygen from the mother's blood. A woman’s ovaries actively release progesterone, and the mother’s immunity decreases. In 7 days, the embryo grows to half a centimeter;
• week 6— the amniotic sac is forming, protecting the embryo from any troubles, the nervous and circulatory systems are developing hourly. The processes of creation of the brain, liver, respiratory organs, and pancreas occur. The baby grows up to 1.3 cm;
• week 7— the size of the embryo’s head reaches 0.8 cm. The visual system is formed, the neural tubes thicken, top part the intestines are distinguished by the esophagus, stomach and pharynx, the bladder and rectum are visible under the lower one, and in male embryos - the prostate. A woman's facial skin may become oily during this period, like a teenager. Hormonal changes can cause itching. In case of any troubles, it is better to consult a doctor for advice;
• 8 week- receives maximum development nervous system, the medulla oblongata is ready for work, the spinal cord and brain have already fully formed, the eyes are still without eyelids, there is a nose, fingers and elbow joints appear on the arms. Mothers should protect themselves from infections;
• Week 9- the third month begins, the face takes on human features, eyelids form, a sucking reflex appears, the circulatory system circulates inside the tiny organism, the heart acquires three chambers, the bronchi branch. Mom's breasts increase so much that the next bra number is required. The uterus enlarges, the ligaments stretch, pulling sensations in the lower abdomen are normal for this period;
• 10 week— A 5-centimeter embryo is already considered a fetus; an ultrasound can determine its gender. His nervous system is divided into central and peripheral, the cerebral hemispheres become more independent. The enlarged uterus can be felt even with your hands, you constantly want to go to the toilet;
• 11 week- the baby’s body gradually straightens, reaching 5.9 cm, the legs begin to actively catch up with the arms, irises form near the eyes, and lymphocytes appear. The mother's kidneys experience a double load, removing waste products for two;
• 12 week- A 50-gram fetus has grown to more than 7 centimeters, the chest moves noticeably when breathing, the heart beats more than 150 beats per minute, milk teeth, vocal cords, and diaphragm are forming. The mother needs to get enough sleep, exercise, and remain calm;
• Week 13- the placenta has reached 16 mm, becoming reliable protection for the baby. From this point on, the body will even tolerate taking antibiotics if necessary. Bones and ribs need calcium. Without subcutaneous fatty tissue, the skin appears wrinkled. Mom may become constipated, her blood pressure may drop, and her kidneys may be bothered. It is important to eat right in order to gain no more than 11 kg during the entire pregnancy, and for a multiple pregnancy - no more than 17 kg;

Second trimester: 14-27 weeks

This is a gently flowing period of bearing a baby, during which the mother’s body is completely ready to work for two, despite the weight gain, rounding of shape, and the appearance of a belly. The embryo's internal organs and systems are fully formed, the child moves his limbs, sucks his finger, and the feeling of his movements gives the mother endless delight. More details:

• Week 14— the baby maintains the chemical composition of the amniotic fluid by secreting urine into it up to several times a day. The ovaries in girls and the prostate in boys are improving. Lack of vitamins affects the mother’s well-being. She has the feeling that there is not enough air. It is worth eating less potatoes and legumes. You may be allergic to strawberries, peaches, and oranges;
• Week 15- the baby’s heart distills about 23 liters of blood, convolutions form in the brain, bone marrow develops, the intestines form original feces, and the amount of amniotic fluid increases. You can talk to your baby! The height of the uterus reaches 14 cm. The woman begins to blossom;
• Week 16— the date the baby moves helps to more accurately determine the date of delivery; he actively moves every 10 minutes. He opens his eyes for the first time. Fetal movement may appear by the 20th week. Exercise and the right menu improve the mother’s condition;
• Week 17— the weight of the fetus exceeds 100 g, and the height reaches 12 cm. He and the mother require calcium and healthy food, since the body type is being determined. A woman feels pressure in her stomach and liver. You have to eat many times a day in small portions so that your stomach has time to cope. Sometimes leg cramps appear due to a lack of B vitamins, magnesium, calcium;
• Week 18- the height of a small child is 13 cm, weight - 170 g, head diameter - almost 4 cm, fingers become proportional, foot length reaches 2.5 cm. Mothers rejoice, feeling his movements. At this time, there is a high probability of determining the baby’s gender using an ultrasound. The ideal weekly weight gain for a mother is 500 g. To reduce swelling, you need to eat less salt;
• Week 19- the child reacts to screams, the volume of the voice, turns his head towards the sound. Listen to pleasant music, do not quarrel with your family. A pattern is formed on children's palms. The kicks in the tummy become more distinct. Women do not always distinguish the movement of the fetus from the processes that occur in the intestines;
• Week 20- the endocrine system is formed, parts of the brain are improving, the baby can swallow, has good hearing, his weight is about 290 g, his height is about 24 cm. Mommy’s waist disappears from the rounding of the tummy, the first stretch marks appear, a comfortable bra is required;
• 21 weeks- if a baby is suddenly born after this period, his ability to survive increases significantly. Systems and organs are formed, the stomach and chest, the head grow, subcutaneous fat is formed, receptors on the tongue distinguish taste, the first leukocytes appear in his body. Requires a lot of protein and 4 times more carbohydrates;
• Week 22— the brain weighs 100 g, the height of the fetus is 28 cm, weight is about 430 g, the mass of the heart increases, ligaments and vertebrae are clearly visible. It is necessary to count the baby's movements, since swelling can compress the blood vessels that carry nutrition to the placenta;
• 23 week- alveoli are formed, the respiratory system develops. Mom needs to drink a lot of water, since plasma consists of it. The fuzz on the child’s head is noticeable during ultrasound examination; the muscles, spine, bones, and aorta are clearly visible;
• Week 24— the baby’s skin gradually smoothes out, thanks to the appearance of subcutaneous fatty tissue. The baby feels the mother's emotions. The doctor listens to how the heart beats, whether the chest and tummy have grown, what is the diameter of the head;
• Week 25— the child’s weight is 680 g, height is 34 cm. The bone marrow is connected to blood formation. In order for the alveoli to function, surfactant accumulates in the lungs. The fundus of the mother’s uterus has risen to 25 cm, her legs get tired more often, and lower back pain appears;
• Week 26— the baby has grown to 35 cm, gained more than 770 g, smells, reacts faster to voices. The diameter of the head is now 65.1 mm, the stomach is 67.4 mm, the chest is 65.8 mm. By this time, the woman puts things aside and spares herself more;
• Week 27- setting the speed of reactions and metabolic processes. The mother needs to gain strength for the upcoming third of gestation. The period is characterized by frequent shortness of breath due to a feeling of lack of air.

Third trimester: 28 weeks until delivery

The most difficult stage for a mother is from 7 months before giving birth. It is accompanied by the active growth of the baby, preparing the child for independent existence. Details:

• Week 28- the baby is exactly 7 months old, you can determine whether he will be right-handed or left-handed. To do this, the ultrasound shows which hand he most often reaches for his mouth. There is already enough surfactant in the lungs to prevent the alveoli from sticking together during the first breath;
• Week 29— the baby’s height has reached 38 cm, weight is more than 1 kg. Only his belly and folds are lubricated. He becomes cramped inside his mother, and the blood fully protects him from infections, but venous and arterial blood still mix. The daily portion of urine excreted is 500 g. The mother is entitled to maternity leave at this time;
• Week 30— the baby’s chest has grown to 77.4 mm, and the tummy has grown to 79.3 mm. The cerebral cortex is formed, the child begins to remember some sounds and sensations. Mom will have to visit the gynecologist weekly. Due to the increased pressure on the blood vessels during sleep, your arms go numb and your legs cramp. The ligaments become elastic, you can do light stretching exercises in the pelvic area;
• 31 weeks— the child’s weekly weight gain is about 200 g. The child needs subcutaneous fat that retains heat. The pigment accumulates in the hair and iris of the eyes. Sometimes the uterus rehearses childbirth, one-off contractions appear;
• Week 32- the baby weighs 1700 g, body length - over 40 cm. If the placenta “gets old”, nutrition will be disrupted, and developmental abnormalities will appear. By this period, the first hair appears. The mother produces vasopressin and oxytocin;
• Week 33- the child has to assume the fetal position because there is not enough space. The body reached 43 cm, the head - 8.2 cm, the tummy - 87.4 mm, the breast - 85 mm. The placenta copes with the function of protecting the baby from harmful factors and nourishes it through the blood;
• 34 week— the baby weighs 2.1 kg. The placenta produces hormones that cause lactation. Its thickness is 3.39 cm. It is important not to overdo it with calcium intake in order to avoid birth injuries. It is necessary to continue to count the movements of the fetus - 4-6 movements are considered the norm;
• — childbirth is possible this week, but much is determined by heredity. The head is 1/4 the length of the body, its diameter is 91 mm. The feet became more defined. The baby's genitals and reflexes are developed. The placenta dries out and supplies nutrition worse. The mother is focused on the upcoming meeting with the baby;
• Week 39- the baby weighs 3.3 kg, height - 51.5 cm. Thanks to the fontanelles made of cartilage tissue, the bones of the skull remain pliable so that the child can pass through the birth canal. The baby will be able to distinguish objects at a distance of 30 cm from the eyes. The placenta ages and the fetus experiences a lack of oxygen. Mom prepares things for the maternity hospital and documents;
• 40 week- the child patiently waited for this hour, gained more than 3.5 kg, grew to 53 cm. The mother becomes worried if labor does not occur. Before giving birth, you often want to go to the toilet, your lower back ache, your cervix gradually opens, and colostrum is released from your nipples.

If labor does not occur at 40 weeks, it doesn’t matter. The norm is resolution within 42 weeks. All you have to do is trust nature. Only 10% of women in labor reach the 42nd week. Dopplerography and ultrasound are performed to assess the condition of the baby and mother. The main thing is to remain calm so as not to harm the health of mother and child.

"cervix" in Latin means "cervix") or the cervical canal. The cervix is ​​4 cm long and the width of the cervical canal is a maximum of 4 mm. The shape of the canal resembles a spindle, that is, its widest part is in the center of the cervix, and the canal narrows upward and downward. This form ensures the preservation of the mucous plug, which is normally present in the cervical canal.

Description

This calculator will allow you to calculate at what stage of pregnancy you are now, the date of future birth, the date of conception, and even the zodiac sign of the unborn baby and its zodiac animal according to the Eastern calendar. You can also determine the age of the fetus, its weight and height, and how much time is left before birth. To do this, you need to enter the date of the first day of your last menstrual period and the length of your menstrual cycle. In addition, our calculator generates a very convenient and practical pregnancy table by week. Using it, you can figure out what week of pregnancy you are currently in, as well as track the height and weight of your unborn child.

The pregnancy calendar will tell you about:

1. sensations and symptoms that await you every week;
2. changes occurring in the body of the expectant mother at a certain period;
3. fetal development, indicating its approximate weight, height, key anatomical features;
4. necessary tests and examinations for timely detection of pathologies;
5. possible complications, problems and their prevention.

Take this into account! On average, a pregnant woman carries a child for 40 weeks or 280 days, which in medical practice begins from the day of the last menstruation. Our calendar also calculates the period in obstetric weeks - it differs from the real “age of the fetus” by 1.5-2 weeks, which is determined by the individual characteristics of the expectant mother (the duration of her menstruation and the period of conception, which can occur on the 7-14th day of the menstrual cycle ).

Pregnancy calculation data according to the calendar in most cases coincides with ultrasound data, which is planned to be performed in each trimester of pregnancy. But you should not worry if the values ​​​​do not match, or the birth does not occur on the expected date - only in one out of twenty cases do women give birth on the calculated day. In most cases, the long-awaited event occurs with a difference of 1-2 weeks, both up and down.

Stanford University follows the following calculation formula:

1. Set the first day of your last menstrual period.
2. Count back three calendar months
3. Add a year and seven days to this date.

For example, your first day of your last menstrual period was September 9, 2019. We count back three months and get June 9, 2019. We add a year and seven days, we get June 16, 2019, traffic rules - the expected date of birth.

The site team understands how important it is for expectant mothers to be on guard, so they offer a new service - an interactive pregnancy calculator, designed specifically for you.

Using our calculator, you can accurately calculate your due date and all the main points of your pregnancy. The calculation will take just a few seconds, the page will refresh, and you will receive your pregnancy calendar by week. Now you will know exactly when your baby will be able to move his fingers, respond to your touch, and hear your voice.

If it seems to you that you became pregnant earlier or later than your menstruation, then after a routine ultrasound you will be able to once again calculate the gestational age, based on a number of medical indicators. Thanks to our service, you will know the answers to many questions regarding your gestational age and expected due date.

Benefits of use
pregnancy calculator:

Every woman has many questions when she becomes pregnant. When will your belly start growing? When will the baby start moving? When do you need to register at the antenatal clinic and when can you go on maternity leave? When can we expect the baby to be born? All these questions can be answered on our website. We described week by week all the changes in the body of the mother and child, indicated all significant events;

Using the pregnancy calculator, you can find out the exact timing of each trimester, significant dates (conception, childbirth, prenatal leave);

At the appointment, the doctor will definitely ask about changes in the woman’s condition. Using a calculator it is very convenient to see what to pay attention to, when certain symptoms should appear;

The obstetrician-gynecologist will definitely draw up an examination plan, tell you which week you need to take certain tests, do an ultrasound and other instrumental studies. The electronic pregnancy calendar is a convenient reminder of exactly when and why you need to go to a consultation. We have tried to explain why each analysis is performed and how to evaluate its results.

Online pregnancy calculator is convenient service, which helps a woman have a clear idea of ​​the course of pregnancy and the sequence of events.

• An approximate calculation based on the average cycle length and the beginning of ovulation - plus 14 days to the beginning of the last menstruation.
• Full 40 weeks.

Gestational age- one of the main components that a gynecologist needs to know about for proper management of pregnancy. After all, on the basis of this, the doctor will prescribe the necessary examinations, tests, routine ultrasounds, monitor intrauterine growth and development of the fetus, and identify possible violations during the course of the pregnancy. In addition, determining the due date allows you to fairly accurately calculate the date of birth and the date of maternity leave. It is necessary for the woman herself to know the duration of her pregnancy in order to mentally prepare for childbirth, have time to prepare a room or corner for the unborn baby, and purchase all the necessary accessories and clothes for him.

In this article we will look at how to determine the duration of pregnancy.

Calculate by monthly

For a woman who comes to register at the antenatal clinic, the gynecologist first of all asks a question about when her last period began. It is from this date that he begins to keep a record, despite the fact that fertilization has not yet occurred. It is known that fertilization of the egg occurs on the day of ovulation, which occurs in the middle of the menstrual cycle. This method of determining the gestational age is called “obstetric”.

An online calculator will help determine the period:

How to determine the gestational age by the date of conception

It is known that conception occurs only during ovulation within 24 hours after the egg leaves the follicle. And the viability of sperm in the female genital tract is up to 3 days. It turns out that the date of sexual intercourse does not always coincide with the date of conception.

Ovulation occurs in the middle of the menstrual cycle. A woman who monitors her menstrual cycle can quite accurately calculate the onset of ovulation. In addition, many people at this time have characteristic features: aching pain in the lower abdomen, breast swelling, irritability, heavy vaginal discharge, increased libido.

It is worth noting that only those women who have a regular menstrual cycle can determine the gestational age by the date of conception.

Online calculator:

(calculation will take a few seconds)

How to calculate using ultrasound

It is possible to find out the gestational age using the results of an ultrasound examination (ultrasound). It is determined according to the size of the fetus. The first ultrasound of the expectant mother is performed at 12-14 weeks, but it is still impossible to accurately determine the period, since the development of the fetus occurs individually in each woman. It is possible to find out the age of the fetus by ultrasound with an accuracy of one day only in the first weeks after conception.

Determination during examination by a gynecologist

A gynecologist can determine a woman's gestational age by the size of her uterus during a gynecological examination. At 5-6 weeks, the size of the uterus can be compared to chicken egg, at 8 weeks - with a goose egg. Later, it will be more difficult to determine how many weeks a woman has based on the size of her uterus.

Find out the due date by the first fetal movement

In the first pregnancy, a woman begins to feel fetal movements at 20 weeks, in the second - at 18 weeks. But this method does not always allow one to determine the period, since some expectant mothers may feel the first movements of the fetus earlier or later than the indicated weeks - some, due to the structural features of the body, cannot feel the movements of the fetus, others confuse the work of the intestines (increased gas formation) with movements.

Determine by hCG

Human chorionic gonadotropin (hCG)- one of the most important indicators, indicating the onset of pregnancy and its normal development. The hormone begins to be produced in the female body after implantation of the embryo into the wall of the uterus. The level of hCG in the blood allows you to find out the approximate age of the fetus. With multiple pregnancies, the level of the hormone in the blood increases in proportion to the number of fetuses.