How to calculate the delivery period
Birth of a child - it is perhaps the most important event in a woman's life. Childbirth require thorough preparation. By this time the woman is simply obliged to be fully prepared. But, unfortunately, it is impossible to determine exactly when the baby is born, up to one day. So when can you expect change? We'll tell you about a few ways to calculate more or less the exact date of delivery.
Instruction how to calculate the delivery period
The most common method to find out the date of birth (maternity) handed down from generation to generation since time immemorial. The fact is that in ancient times the servants of Asclepius had no idea of ovulation, so the calculations were carried out, starting from the first day of the last menstrual period. Pregnancy as such is clearly not in this period, but it was estimated that the birth distant from this day exactly 280 days (40 weeks). This way of calculating the term of delivery was the first accepted and then completely firmly established in obstetrical practice.
The second most popular method of determining the time at which births will fall: the date of the first day of the last menstrual period, add seven days, and subtract three months from the serial number of the month. For example, last menstrual period began on 12 July (12.06.10). Then consider: 12 + 7 = 19. If June (6) take three months, you get March (3). Hence, the expected date of birth - March 19 (19.03.11).
More precisely determine the delivery time as possible, on the basis of the date of ovulation - the most opportune moment for conception. Life expectancy of the egg is exactly twenty-four hours, so the day after ovulation, conception does not occur. When the menstrual cycle lasts from 32 to 35 days, ovulation accounts for 16-18 days from the beginning of menstruation. If the menstrual cycle is 28 days, ovulation typically occurs at day 14. If the cycle is 21-24 days, then it falls on the ovulation day 10-12. Suppose, menstruation began on June 10 cycle is 28 days. Ovulation is expected on June 24 suitable for conception time - from 19 to 24 June, 25 June pregnancy possible, and since June 26 - unlikely. If the menstrual cycle is 24 days, ovulation occurs 20-21 June, conception is possible with 15 to June 21-22. When the menstrual cycle 32 - 35 days, ovulation is predicted on June 26-28, conception is possible from 21 to 28 June. Ovulation can be determined much more accurately, if systematically measure the basal temperature (in the rectum). It is recommended to measure in the morning at one and the same time without getting up from bed. Thermometer is introduced for 10 minutes into the rectum at 5 cm. With daily measurement of a schedule of basal temperature that does not exceed 37 degrees before ovulation and rises after. Ovulation occurs on the day before the temperature rise.
Determine the delivery date and can be the first fetal movements. By the date of the first perturbation added 20 weeks (for nulliparous women) and 18 weeks (for multiparous). However, this method of calculating the term of delivery even more controversial than the previous. Some women begin to feel fetal movement is much ahead of time (20 weeks), while others, on the contrary, a little later. In fact, it depends on the activity of the child, its location in the uterus, on the level of sensitivity of the uterine wall, and some doctors say that very often a woman confounds conventional gasification with the first fetal movements.