Is the due date accurate? Is it possible to give birth prematurely?

The expected date of delivery is the approximate time when a child is born, which is calculated according to a specific formula. Generally speaking, this time is more accurate. Clinically, many people give birth to babies in the expected date of delivery or one or two days before and after. However, according to medical regulations, it is normal for the expected date of delivery to be advanced or delayed by 14 days. Therefore, the answer to the main question is that it is entirely possible to give birth prematurely.

What is the formula for calculating the expected date of delivery? The expected date of delivery is calculated according to the last menstruation of pregnant women, that is, from the first day of the last menstruation of pregnant women. For example, if a pregnant woman's last menstrual period comes from the solar calendar in 2020 165438+ 10/2, then her expected date of delivery is +9 (or -3) in that month, that is, 1 1-3. If the pregnant woman provides the lunar calendar, the calculation of last month remains unchanged, and the calculation of the day is+14.

Calculating the expected date of delivery is the most basic step of pregnancy test. Generally, when going to the hospital for the first time, the doctor will calculate the time provided by the pregnant woman as a reference for all future pregnancy examinations.

Why are some people inaccurate in the expected date of delivery, which leads to the early or delayed birth of children? In fact, in the clinical work of obstetrics and gynecology, the expected date of delivery is not an accurate time. Some pregnant women will be born one or two days earlier or later, which is an accurate due date. Others will even be born two weeks or half a month earlier, which is actually normal, that is to say, it is normal to be born between 38 weeks and 42 weeks pregnant.

Why is this happening?

In fact, this is closely related to the menstrual cycle of pregnant women.

Menstrual cycle refers to the time between the arrival of this menstruation and the arrival of the next menstruation. We also know that everyone's menstrual cycle is different. Generally, the menstrual cycle is 28-30 days, but many people will have less or more than this time. Accordingly, different menstrual cycles, pregnant women ovulate at different times, and the time when sperm and eggs combine to form fertilized eggs is even different, resulting in different birth times of children.

Many people have questions. If the child is born early, isn't it better for the child whose physical indicators have not reached the expected date of delivery? That's not true.

Pregnancy is a magical thing.

From the moment when sperm and eggs meet and become fertilized eggs, the fetus is constantly developing and growing. This process will run through the whole pregnancy, and the process of fetal development is also orderly. First, the great vessels, nerves, bones and important organs of the heart are formed, and then they develop in the third trimester, and then they continue to grow, and muscle fat continues to increase, so some children are plump at birth, and some children are thin at birth.

However, no matter whether the child is thin or fat at birth, his basic development is completely successful. Therefore, as long as the child is born between 38 weeks and 42 weeks, it is a normal baby except for pathological factors.

Sharing medical knowledge and spreading health concepts, I am Mu Zi @ Family Doctor, focusing on spreading health, pregnancy and parenting knowledge. If you like, please pay attention to me.