Calculate pregnancy time from ovulation period

The first day of a woman's last menstrual period usually falls on a certain day of the year, so pregnancy is calculated from that day. Generally speaking, pregnancy time is calculated from the first day of a woman's last menstrual period, which usually refers to women with a menstrual cycle of 28 days. Therefore, if a woman has a 28-day menstrual cycle, her pregnancy will be measured from the first day of her last menstrual period to the 14th day.

During this time, the process of egg maturation and expulsion may occur in women. After the egg is released, it usually travels within a few days to the woman's fallopian tubes, where it awaits fertilization. If fertilization is successful, the egg divides into two cells and develops into an embryo in one of the ovaries.

Therefore, the method of calculating pregnancy time from ovulation only calculates the time frame during which a woman becomes pregnant, not the exact date. In addition, the length of a woman's menstrual cycle will also have an impact on calculating the time to pregnancy, because the longer the menstrual cycle, the shorter the pregnancy time will be.