Many young couples do a lot of preparation work before they want to have children. Generally speaking, in order to increase the chances of pregnancy, it is necessary to calculate a woman's ovulation period, which is mainly determined based on the menstrual cycle. Let's take a look at the relationship between the last menstrual period and the day of conception.
What is the relationship between the last menstrual period and the day of conception
Taking a menstrual cycle of 30 days as an example, if the first day of this menstrual cycle is on September 29th, then the next menstrual cycle will be on October 29th (September 29th plus 30 days). Subtracting 14 days from October 29th, then October 15th is the ovulation day. The ovulation period includes the day of ovulation, as well as the first 5 days and the last 4 days, from October 10th to 19th. Having sexual intercourse every three days within these ten days may lead to conception. So the date of the last menstrual cycle also determines the date of conception.
The correct calculation method for conception day
Generally speaking, the survival time of eggs does not exceed 3 days, and the survival time of sperm in the female body generally does not exceed 4 days. That is to say, the effective conception time during ovulation is generally 5 days before ovulation in women, because sperm can survive in the female body for up to 5 days, and 2 days after ovulation in women, because eggs can only survive in the female body for 2 days after ovulation, which means that the effective conception time is generally around 7 days. But because the follicles have already begun to develop before conception, that is, after menstruation, and it takes about 7 days for the egg to mature and ovulate before conception can be achieved, we usually start calculating the due date from the last menstrual day.
Many inexperienced women do not know how to calculate the time of conception. In fact, before the egg is fertilized, the egg cell has already begun to develop. After it combines with the sperm, conception is successful. Therefore, the development of the egg cell is used as the first day of conception, which is the end of the woman's most recent menstrual period.
