"How many at you months?" – the question asked by impatient relatives and friends often nonpluses future mom. Term in clinic for women can be put in obstetric weeks. Or perhaps to you and most will watch more conveniently development of the kid, considering for months as our mothers and grandmothers did it.
Instruction
1. For a start it is necessary to understand what starting point means the beginning of pregnancy. Conception usually happens in the middle of a cycle, for 14-16 day after the beginning of periods. It is possible to learn about a delay in 2-3 weeks, and logically this term has to correspond to two-three weeks of pregnancy, or a half of the first month. And future mom coming to clinic for women with a week of a delay is often dumbfounded by the term which is told to her by the gynecologist: 5 weeks.
2. The fact is that other scheme is more convenient to doctors in clinics for women and maternity hospitals. It is unknown when your ovary left an ovum, and there was a conception. At some women the fertilization can occur not for the 14th day, and in the first days after periods or for 17-20 day of a cycle. Not each woman can call number in which there was an unprotected sexual intercourse.
3. Therefore gynecologists of the whole world consider the beginning of pregnancy of the first day of the last periods. Thus, pregnancy lasts 280 days, or 40 weeks.
4. As for calculation of pregnancy on months, because of addition to the obstetric term of 2 excess weeks, it turns out that first "month" of pregnancy is the most mysterious, it consists of 6 weeks! Further months remain usual calendar: 7-11 weeks – the 2nd month, 12-15 weeks – the third month, 16-19 weeks – the fourth month, 20-24 weeks – the fifth month, 25-28 weeks – the sixth month, 28-31 weeks – the seventh month, 32-35 weeks – the eighth month, 36-40 weeks – the ninth month.
5. It is and still more correct to consider pregnancy term in obstetric weeks – and it is less confusion, and it will be more convenient to monitor growth of the kid. In magazines for mothers, medical sources and prenatal records world-wide accepted scheme of calculation is used for a long time.