The majority of cases will not be pregnant after intercourse, but there are some women who have the possibility of pregnancy.
If the sperm and egg combine to form a fertilized egg, and the fertilized egg is successfully implanted, it means pregnancy. With the hormone level in the body rising rapidly, the uterine lining will gradually thicken and not shed, so it will not come to menstruation. So, if you have a period after intercourse, and the amount of menstruation is almost the same as usual, it means that you are not pregnant.
In addition, although some women become pregnant after intercourse, the fertilized egg will cause irritation to the uterine lining when it is developing in the uterine cavity, resulting in a small amount of bleeding, which is mistaken for menstruation.
For women who are sexually active, it is recommended that they go to the hospital for a blood test for human chorionic gonadotropin to determine if they are pregnant if they have a period that is significantly less than their usual menstrual flow.
In addition, women who do not want to have children need to use effective contraception when having sex.