Why do women get pregnant from their last menstrual period?

From the date of the last menstrual period, the ovulation date of the woman can be determined, the time of conception can be determined, and the approximate due date can be calculated to prepare for childbirth.

For women with normal menstrual cycles and normal ovulation, most clinical medical practices in the world currently use the first day of the last menstrual cycle before pregnancy as the start time of pregnancy. Thereafter, one day is added every other day, 7 days a week, and the day on which the pregnancy reaches 40 weeks is the expected date of delivery. For example, if the first day of a pregnant woman's last menstrual cramps is January 1, 2017, the expected date of delivery is October 7, 2017.

However, this is not accurate, with only about 5% of pregnant women giving birth as expected, and most women will give birth about a week before and after their due date.

For women with irregular menstruation, especially those with irregular ovulation, the onset of pregnancy should be most accurately estimated by the first trimester ultrasound. This requires you to go to a regular medical institution for an early pregnancy ultrasound after pregnancy, preferably 6-8 weeks postmenopausal, i.e. from the first day of your last menstrual period to 2 months. On the one hand, it is possible to confirm whether it is an ectopic pregnancy, and on the other hand, the obstetrician and gynecologist can deduce your expected date of delivery based on the data indicated by the ultrasound.

If the estimated date of delivery on ultrasound** matches the estimated date of delivery for menopause**, the number of weeks and days of pregnancy can be calculated based on the time of menopause. There is a significant difference between the expected date of delivery on ultrasound** and 40 weeks of menopause for pregnant women, and ultrasound should prevail and the number of weeks and days of gestation per day should be extrapolated from the estimated date of delivery on ultrasound**.

Because of this, the due date can be calculated more accurately.

Generally speaking, it must be the first menopause to start counting pregnancy.

This may be prescribed by the hospital as such, and it may let you know the specific date of birth.

Because this time is the most accurate, and it is easier to calculate.

This is because it is the most accurate and error-prone.

Because if you calculate it this way, it's exactly ten months, so that's how it is calculated.

Because this is the most accurate calculation, let's minimize the error.

Because it has always been calculated like this, it is exactly ten months when you are pregnant in October.

Because this is the most accurate, that's how it is calculated.

Many women go to the hospital for a check-up when they are just pregnant, and the doctor will start counting the pregnancy period through the woman's last period, so why is this? Let's find out.

1. Why should the pregnancy be counted from the last menstrual leave?

Because each woman's physique is different, and the menstrual cycle is also different, some women's menstrual cycle is 28 days for a cycle, but some women's menstrual cycle is longer, such as about 40 weeks. Therefore, if you want to determine the date of fertilization of the egg, it is not very easy, so the pregnancy disturbance is from the last menstrual leave as the beginning of the pregnancy, the average woman needs about 40 weeks during the entire pregnancy, but the real pregnancy time is about 265 days, and the female ovulation period is generally about two weeks after menstruation, so the pregnancy is counted from the last menstrual leave, but it is just an estimate is generally very little, and the pregnant woman will give birth on the day of the expected date.

2. What should not be eaten during the preparation for pregnancy?

1. Pickled food. Women should try not to eat pickled food during pregnancy preparation and pregnancy, because pickled food contains a large amount of nitrite and phenylpropylpyrene and other substances, these substances are very bad for the body, in addition, if excessive consumption of pickled food during pregnancy, it will have a great impact on the fetus, and in serious cases, it will lead to miscarriage and premature birth, and even lead to fetal malformations.

2. Spicy food. If you eat too much heavy and spicy food during the preparation for pregnancy, it is likely to cause digestive disorders, such as constipation, indigestion and so on, which has a certain impact on the success of conception.

3. High-sugar foods. During the preparation for pregnancy, you should avoid eating some high-sugar foods, because excessive consumption of high-sugar foods will cause the body's funny metabolic disorders, and may become a potential diabetic, which has a certain impact on later pregnancy, if pregnant women eat some high-sugar foods during pregnancy, it is likely to lead to gestational diabetes in pregnant women, which has a very serious impact on the healthy development of the fetus.

It's because only in this way will you spend October to conceive, and this world potato cycle is actually an average of 28 days for a cycle, and the number of days of pregnancy is about 280 days, so there is still a certain difference, so it needs to be counted from the last menstrual holiday of pure slippery.

I don't know, because the fertilization of the egg is the real pregnancy time, and the month of the expected date of delivery can be calculated, so it must be calculated from the situation of menstruation.

This will ensure that you can have an accurate number of your baby's pregnancy and childbirth date.

If a pregnant father loves his wife, then he will definitely not let his wife worry about remembering such a thing as pregnancy. After all, pregnant mothers are already more difficult and tired when they are pregnant, and at this time, they have to calculate their pregnancy cycle, not tired. Why should pregnancy start from the last menstrual period?

The time of pregnancy is really difficult to calculate, because the time of pregnancy is calculated according to the woman's menstrual cycle and ovulation period, for women with normal menstrual weeks and normal ovulation periods, it is generally calculated from the first day of the last menstrual period, if it is calculated from the day of conception, then the gestational week may be about two weeks less than what we calculated.

Usually, we calculate the gestational week from the first day of the last menstrual period. Remember, it's the first day of menstruation, not the day of your period. For people with regular menstrual cycles, this calculation is very simple and accurate.

Therefore, the date of the arrival of the "old friend" plays an important role in calculating the gestational age and the expected date of delivery.

If a woman's menstruation is 28 days as a menstrual cycle, then 280 days of pregnancy is equivalent to ten gestational months or ten menstrual cycles. The due date is only an estimate, and the actual delivery time is often 1-2 weeks different from the due date.

Generally, when we go to the hospital to check whether we are pregnant, it is within half a month after the menstrual period is delayed. During this period, if the time of pregnancy is detected, we can add nine months to the month according to the time of the last menstrual period, or subtract three months, so that our expected birth is the same as the curve. In terms of dates, we need to add seven days to the number of days, so that it is the due date in the future.

Don't think about anything else until you have done something, or until you have achieved something. Do one thing at a time, or you have to start all over again, and spend a lot of time on changing different things. After doing one thing, do another.

Learn to fully delegate all the things in your life that you feel you can delegate right now, write them down, and find the right people to delegate them. 10. It is best to do the same kind of things at one time If you are doing paper homework, do paper homework during that time; If you are thinking, take a period of time to just think. If you want to hit **, it's best to accumulate ** to a certain time to finish it at once. When you do one thing repeatedly, you will learn more and be more efficient.

Whether or not you use your time is not simply based on whether your working hours are filled with various tasks. There are many managers who are busy from morning to night, and they are not only crowded with various jobs during working hours. They also look for time to continue working outside of working hours.

This phenomenon alone does not indicate that the manager will use his or her time. His work ethic is good, but he can't be called the best manager, nor can he be called a good use of time.