Only those women who carefully plan pregnancy, use special tests to determine the day of ovulation and clearly know their menstrual cycle, can be sure of the date of conception with an accuracy of the day.
Instructions
Step 1
On the other hand, this precision is usually not required. In order to understand on what day approximately - plus or minus two - conception began, it is enough to recall the date of the last menstruation that came before pregnancy. Why is it so?
Step 2
A woman's menstrual cycle usually lasts about 28 days and consists of two equal phases, each lasting 14 days. During the first phase of each cycle, the woman's body prepares for pregnancy: under the influence of certain hormones, the inner layer of the uterus thickens (where the fertilized egg will attach if fertilization occurs during this cycle), a follicle forms in the ovary (the cavity in which the egg develops before exit and move into the fallopian tube). The release of an egg from the ovary occurs in the middle of the cycle, usually on the 14th day from the first day of menstruation. The ovum, drawn by the movement of large villi located along the edge of the fallopian tube, is drawn into it and moves towards the uterus with the help of small tubular villi. It is in the tube that the egg and sperm meet, fertilization and the subsequent movement of the ovum into the uterine cavity, for attachment to its bottom and the development of a full-fledged pregnancy.
Step 3
If fertilization has not occurred, then the second phase of the menstrual cycle begins - another group of hormones is activated, which prepares the body for the exfoliation of excess tissues in the uterus. After that, on the 28th day of the cycle, menstruation occurs, which is the rejection of tissues that are not needed for implantation of the ovum.
Step 4
Thus, the most likely day to conceive is the 14th day of the menstrual cycle, plus or minus two days. Therefore, adding two weeks to the first day of the last menstrual period before pregnancy, you can quite accurately determine the day of conception.
