Trimester of pregnancy - terms

Perhaps there is no woman who does not know how long a pregnancy lasts. However, when it occurs, the girl is faced with such a problem as determining the timing, and tries to understand the concept of trimesters of pregnancy.

How many trimesters are in pregnancy?

It is known that the calculation of the gestation period begins on the first day of the last monthly period. Normally, the entire period of gestation is 9 months or 40 obstetric weeks. If counted in days, then their number is approximately equal to 280.

Due to the fact that in one month 30 days, and in another month 31, the number of whole weeks in each one is different. So, only in February there are exactly 4, if this is certainly not a leap year. Therefore, it turns out that during pregnancy counting, the pregnancy takes 9 months, and if counted according to the obstetrician, 10. This is why, in future mothers, there is often a question as to how many trimesters are in pregnancy.

Based on the above calculations, it turns out that the pregnancy consists of 3 trimesters.

Trimester - this is how many months?

Pregnant, the girl often thinks about how long the trimester lasts. This question arises because when visiting a gynecologist, a woman repeatedly hears this term from a doctor.

It is not difficult to guess that the number "three" directly and indicates how many months it takes for one trimester. Thus, the entire pregnancy takes 3 trimester, each of which is 3 calendar months.

Knowing what "trimester" is and how much it lasts for months, you can easily calculate which week to which trimester belongs. So, the duration of trimesters :

• 1 - from 1 to 14 obstetric week;
• 2 - from 15 to 26;
• 3 - from 27 to 40.

If the pregnancy lasts more than 40 weeks, it is said about the fetal retention , which is fraught with negative consequences for the health of the crumbs.