How to calculate the expected date of birth?How to distinguish from premature birth and delivery and full -month birth?

Childbirth refers to the process of fetus and its attachments (placental, fetal membrane, amniotic fluid and umbilical cord) with a pregnancy of 28 weeks and after the pregnancy.

Those who give birth during pregnancy to less than 37 weeks of pregnancy are called premature birth.

During 37 weeks of pregnancy to less than 42 weeks, delivery is called full monthly production.

For 42 weeks of pregnancy and subsequent delivery, those who have giving birth are called output.

So how is this cycle calculated?

The pregnancy period is calculated from the first day of the last menstruation, about 280 days (40 weeks)

The calculation formula for the due date is the first day of the last menstrual period. The monthly decreases 3 or plus 9, and the number of days plus 7 (the number of days of the lunar calendar plus 14).For example: The first day of the last menstrual period is August 5, 2021, and the due date is May 12, 2022.The actual date may be 1-2 weeks.

So why do we feel heartbroken pain during childbirth?

We must not be separated from the process of naturally, that is, the power that the fetus and its accessories are forced from the uterine cavity.The most important one is the shrinkage of the uterus.

The uterine shrinkage force will cause rhythm and compound contraction.And this will cause our blood vessels to shrink and cause hypoxia and cause pain.Another is the physiological expansion stimulation of the cervix and the oppression of the fetus.There is also a tear pain in the vaginal opening.There are also pain syndrome caused by nervous and anxiety during the production process.

These are important causes of severe pain in the production process.

In fact, what we don’t know is that the fetus is the true main force of childbirth.They can successfully discharge this series of position conversion in our body’s position in our body.

Let’s take a brief look at the specific delivery mechanism:

A total of seven processes are divided into seven processes: connection, decline, push -up, back extension, reset and rotation, and fetal shoulders and fetal delivery.

This is the entire childbirth mechanism of our normal pillow.

This is the end of today’s content. Tomorrow we share the performance of the early pregnancy and the prerequisites for giving birth.

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