It is often said that it is a few weeks pregnant, how should it be calculated?

The gestational week is counted from the first day of the last normal menstrual period, and seven days are counted as one week. Gestational age is expressed in full days or weeks. For example, delivery on the 280th day 2 after the start of the last normal cycle If the menstrual cycle is normal, the gestational age, i.e. gestational week, is calculated from the first day of the last normal menstrual cycle.

Calculated by last menstrual period: the date of the last menstrual period plus 9 months or less 3 months is the expected number of months; In a few more days, if menstruation is irregular or the date of the last menstrual period is uncertain, the gestational age may be determined by the ultrasound or the time of the roommate.

If some of the children need to have regular menstruation, the number of weeks of pregnancy is counted from the first day of the last menstrual period. The number of days of pregnancy divided by seven equals the number of weeks of pregnancy. The entire pregnancy cycle is 40 weeks.

A delay or expectation of two weeks is normal and should be calculated as every seven days from the first day of the last menstrual period, depending on the embryo transfer cycle and the number of embryo days.

The entire gestation period is 280 days for a total of 40 weeks, and the expected delivery period is 40 weeks. The expected date of birth is calculated by having fewer than 3 or more than 9 months and more than 7 days. It is not clear how the expected date of birth is calculated.

A very simple way to do this is to go to the hospital and see a doctor. Based on the results of the examination, the doctor will calculate the time of pregnancy, which is not only safe, but also the last menstrual period. Count the number of weeks of pregnancy and stay at home for two weeks, as the time of pregnancy is about two weeks away from the first day of your last menstrual period.

Another case is an irregular menstrual cycle, or the next menstrual period is on March 1, March 1-7 is the first week, and November 29 to December 5 is the forty-fifth week of pregnancy, that is, the expected period of delivery. The estimated delivery period is 280 days, 7 days for one week, and the entire gestation period is 40 weeks. The first trimester is called before 12 weeks, the average pregnancy is called after 12 weeks to before 28 weeks, and the third trimester is called after 28 weeks to after 40 weeks.

For example, the last cycle is 20. It can be calculated by the same pregnant woman, and the latter can be calculated by the doctor based on the results of the examination. The latest menstrual algorithm is suitable for pregnant women:

Women with regular menstrual periods and cycles of 28-30 days. There is also a simple calculation for September 1, 2008.

When the pregnancy test comes out, there will be an approximate number of days, and we will use this number to calculate how many weeks of pregnancy we have.

It should be calculated from the last menstrual period, week by week, to calculate the current weeks of pregnancy.

It should be counted from the last menstrual period, and the week by week can be calculated to calculate the number of weeks of pregnancy.

Doesn't that feel a little unexpected? In fact, when I saw this calculation method at the beginning, I was also a little confused.

How do I know? In fact, I found out that I hadn't come to my period for a long time, and a test, oh, two bars, it turned out to be there. So I rushed to the hospital.

The doctor's first sentence is to ask: When was the last menstrual holiday? I said the date, and she wrote it directly:

Date of pregnancy: October x.

And in the follow-up prenatal check-ups, I gradually learned that pregnancy is basically calculated according to the gestational week, regardless of how many months she has been pregnant.

Well, since it's stipulated like this, that is, everyone calculates it like this, we don't want to worry about why, anyway, during pregnancy, hormones cause a surge, causing the brain to become stupid, and I don't want to delve into why. As long as the baby in the belly grows up healthily, it's fine!

And pay attention to your blood sugar and blood pressure, especially in the third trimester. The third trimester of pregnancy is highly susceptible to gestational diabetes and gestational hypertension.

Therefore, you should always pay attention to your physical health and the normal growth and development of the fetus, and don't worry too much about why the initial date of pregnancy is calculated in this way! As long as you can give birth to a healthy baby, you're fine!

Here, I wish all pregnant mothers can be healthy, safe, and happy!

It should be calculated from the beginning of menopause, seven days is a week, and the number of weeks of pregnancy is often divided by 7 days.

It should be calculated by the time of your pregnancy, and you also need to pass the time of your first prenatal checkup, which can be calculated as 4 weeks in the early stage.

When there are some pregnancy reactions, such as vomiting or lack of energy, we can go to the hospital for a check-up so that we can know that we are pregnant. Through professional instruments, you can check the baby's physical condition, and you can also know how old the baby is. Then the pregnant woman can remember that the baby is now a few weeks old, and she can make a calculation, a week is 7 days, and after 7 days, a week is added.

We must know that when you are pregnant, you must count it in weeks, and the pregnant woman will start giving birth at 40 weeks of pregnancy, as long as you give birth at 37 weeks to 42 weeks, it is relatively normal, indicating that your child is a full-term baby. If you use months to calculate, it may be very inaccurate, because we often say that the months are more than 30 years, and the months on pregnancy are actually only 28 days, so we can calculate in a week, and a week is 7 days. At 40 weeks of pregnancy, the pregnant woman can go for a prenatal check-up, then calculate the due date, and go to the hospital for delivery when the due date arrives.

So as long as the pregnant woman can know how many weeks old her child is, she can calculate accordingly, after all, there are only 7 days in a week, and after 7 days, the pregnant woman can make a mark, indicating that the child has an extra week and the child has grown up. After the child is a week older, the pregnant woman can be more assured, because the older the child, the easier it is to keep it, there will be no miscarriage, and the pregnant woman can raise the fetus with peace of mind.

If a pregnant woman doesn't know how many weeks old her baby is, she can't know what to eat. Therefore, pregnant women must know how many weeks old their child is, so that they can supplement the corresponding food and promote the development of the child. After all, the food eaten by pregnant women in the first and second and third trimesters of pregnancy should be different, and different nutrients should be supplemented, so that the child can develop in a better direction.

Therefore, pregnant women must make a statistic so that they can understand how old their children are and know what they should eat.

If it is a woman with a regular menstrual cycle, for example, the menstrual cycle is 28-30 days. The gestational week is calculated from the first day of the last menstrual period, 7 days is a week, and the entire pregnancy period is 280 days, which is 40 weeks.

After the pregnancy is confirmed, from the first day of the last menstrual period, the number of days to the current pregnancy is the specific time of pregnancy, a gestational week is 7 days, and 4 gestational weeks are a month.

At this time, it should be calculated according to the time of your last menstrual period, and then you can also go to the hospital for an examination, and calculate it according to the relevant data.

You can extrapolate from your period. If you know your period last month, you can calculate how long your baby has been here.

You should calculate based on the time of your last menstrual period, because many people nowadays do it.

Medically, the number of days of pregnancy is defined in weeks, with 7 days being a week. However, how many weeks you are pregnant should be counted from the day of the last menstrual period, although fertilization and implantation do not start from the last menstrual period, but you can't tell which day it is, so it is calculated from the last menstrual period. If the last menstrual period is after April, it is calculated by minus 3.

For example, the last menstrual cramp is April 2, that is, April - 3 = January of the following year, 2 ten 7 = 9 days, that is, January 9 of the following year is the expected date of delivery.

If the menstrual period is unstable, or the date of the last menstrual period is not remembered, you can also do a B-ultrasound examination in the first trimester of pregnancy, and the gestational week and the expected date of delivery can be calculated through the results of the examination, and the accuracy rate is relatively high; Note that the gestational age of pregnancy examination is not accurate in the second trimester and third trimester, because there are individual differences in fetal development, so for gestational age, the first trimester of pregnancy examination results must be used to achieve the highest accuracy. Because many pregnant mothers cannot accurately say the time of conception, it is medically stipulated that the expected date of delivery is calculated from the first day of the last menstrual period, and the entire pregnancy period is 280 days, 7 days for a week, a total of 40 weeks.

Months plus 9 or minus 3 (4-3=1), days plus 7 (25+7=32). The expected date of delivery should be January 32. However, there are only 31 days in January, so it can be deduced that it should be February 1, 18.

This inverse algorithm is based on a 28-day menstrual cycle, so it must be corrected for the length of the individual's menstrual cycle. Gestational week is also a method of calculating the expected date of delivery, under normal circumstances, 40 weeks of pregnancy is the expected date of delivery of pregnant women, and it is normal to give birth within two weeks before and after the expected date of delivery, which also gives the pregnant mother a time reference, and can prepare the required items such as the delivery bag in advance.

Of course, after pregnancy, the hospital will also do a gestational week correction through NT, that is, there will be NT estimated due date and the estimated due date of the last menstrual period, generally speaking, the hospital will focus on NT due date. In the later stage, a due date will also be estimated based on the size of the fetus in the case of large and small deformities.

The number of weeks of pregnancy that doctors refer to is generally calculated based on the last menstrual period of the pregnant woman. If the last menstrual period is in the Gregorian calendar, it is the month minus 3 days plus 9. If it's a lunar date, it's minus 3 days plus 15.

Doctors calculate from the first day of menstruation, which is 40 weeks from that day to the last birth.

A week is a week, a month is a week, and a month is four weeks, and that's what it does.

The number of weeks of pregnancy that the doctor refers to as a pregnant mother is counted from the first day of her last menstrual period. However, this calculation method is only for people with regular menstrual cycles.

Generally, after pregnancy, the pregnant woman will secrete a special chorionic gonadotropin, which appears in the urine of the pregnant woman 17-20 days after fertilization, and the job of chorionic gonadotropin is to maintain the development of the corpus luteum in the ovaries, so as to maintain pregnancy, which can be detected by the test strip of the pregnancy test for detecting urine.

From the first day of the last menstrual period, the expected date of delivery is calculated by adding 9 or subtracting 3 from the month and adding 7 to the number of days. In many places, it is customary to calculate according to the lunar calendar, which means that from the first day of the last menstrual period, the month is still plus 9 or minus 3, and the number of days is plus 15.

The algorithms of both the new calendar and the lunar calendar are based on the pattern of menstruation.

Women's menstrual regularity indicates that women's bodies are very healthy, ovarian function is good, and women's health will be reflected in menstruation. A woman's normal menstrual cycle is 28-30 days, and some people's menstrual cycle is 25 or 40 days, as long as it is regular. In addition, menstruation is very easy to be affected by diet and mood, which leads to 3-5 days earlier or later, which is a normal phenomenon.

For people with irregular menstrual cycles or unclear memory, the doctor needs to use the B noise test to further diagnose and calculate the approximate date of delivery according to the date of positive pregnancy or the size of the uterus at the first examination of the first pregnancy and the date of fetal movement.

Therefore, after pregnancy, the embryonic period is 1-8 weeks of pregnancy, and the fetal period is from 8 weeks to before birth.

The embryonic period in the first eight weeks of pregnancy is the period of differentiation and development of vital organs, which is developing and changing all the time, and this period is also called the teratogenic sensitive period, and the focus of health care is to prevent teratogenesis.

Therefore, when we are preparing to get pregnant, or have just detected pregnancy, we must be careful not to take some drugs orally, or be exposed to viruses, bacteria, and radiation, which will affect the initial embryo.

If you are pregnant and go to the hospital for a check-up, the doctor will generally ask about your menstrual history, and then calculate the expected date of birth of the fetus through your menstrual history, of course, this due date is a budget, the child will not necessarily be on the due date, forty weeks on the day of ripeness, just right. It may be earlier or later.

When I had a child, the child was born at 40 weeks plus 6 weeks, and the twins of the second child were born at 38 weeks + 5 days, and it is not necessarily which day they were born, and the individual reaction is not the same, but the importance of calculating this gestational week is that he has an approximate time period, the first trimester, the second trimester, and the third trimester, what nutritional intake should the relative pregnant woman pay attention to, what pregnancy reactions will have, and what movements the fetus will have, which is a corresponding reference standard.

It can be used by doctors and pregnant women to self-monitor. So although it is not how old the child is, it is a more general time tester.

Generally, it is calculated from after the end of your last period, and you can choose a software that keeps a period of time, which can also help you calculate the number of weeks of pregnancy.

The gestational age of pregnancy is calculated from the first day of the last menstrual period, which is generally two weeks earlier than the time of ovulation or fertilization, and three weeks earlier than the time of implantation of the fertilized egg, so the whole process of pregnancy is generally calculated as 40 weeks. However, for pregnant mothers with irregular menstrual cycles, fetal ultrasound in the early stages of pregnancy is needed to help determine the exact gestational age.