For women in this era, it is difficult to accurately determine whether they are pregnant, especially shortly after menstruation, and it is even more uncertain whether they are pregnant. So, will they become pregnant four days after menstruation?

Firstly, regarding the date when women release their eggs, most of them are about half a month before their next menstrual period. Before this period, the egg cells will not be released and cannot combine with sperm to produce a fertilized egg, thus there is no possibility of pregnancy. So, if the endocrine system and ovarian function are relatively normal, women do not need to worry too much about getting pregnant during the past four days of menstruation.
Secondly, there is a certain relationship between pregnancy and sexual activity in the past four days of menstruation. Assuming that the egg cells are released in a special situation, the chance of pregnancy is also limited to fertilization.
There is another situation that is quite special, which is women who usually take contraceptive pills or have irregular dietary and lifestyle habits. Their menstrual cycle may be different from most women, resulting in an earlier or delayed release of eggs. In this case, it is necessary to go to a regular hospital for relevant examinations to determine whether they are pregnant.