Patient's question:
How are the days of pregnancy calculated?Doctor's answer:
The correct calculation of pregnancy duration starts from the first day of your last menstrual period, not from the day of intercourse. Many people assume that pregnancy should be calculated from the day the sperm and egg combine, but this is actually incorrect. For example: if your last menstrual period started on March 1st, then by April 10th, the calculation would be 40 days pregnant. From a physiological perspective, this means counting the days from the first day of your last period to the present. This is the number of days pregnant. This should be relatively easy to calculate, but it's not always accurate. The reason for this calculation is that pregnancy can occur either before or after the menstrual period. Some women may already be pregnant before their last period. Of course, most women actually conceive about 15 days after their last period.The second method of calculation is as follows: From an embryological perspective, simply subtract 15 days from the number of days calculated above. This is essentially the actual time of conception. This period represents the time around the true ovulation period. Of course, this calculation is only applicable to women with relatively regular menstrual cycles.