It’s possible to get pregnant on the 20th day of your period, and it’s related to the timing of a woman’s ovulation.
If a woman’s menstrual cycle is relatively regular, then 14 days before the next menstrual period around ovulation, the day of ovulation, the highest probability of pregnancy, ovulation before and after 3 days have the possibility of pregnancy, this period of time is the susceptibility to pregnancy.
If a woman’s menstrual cycle is 26 to 28 days, then the probability of pregnancy is relatively small; if a woman’s menstrual cycle is relatively long, such as each menstrual cycle of 32 days or so, then the 20th day of menstruation intercourse is possible to get pregnant.
If you are planning to have a child, it is best to arrange for multiple intercourse within 2-3 days before and after the day of ovulation to increase the probability of pregnancy. If you don’t want to have children, then you must use proper contraception.
After intercourse on the 20th day of menstruation, if you don’t have your period by the time it’s due, then there is some possibility of pregnancy. It is recommended that a blood hCG (human chorionic gonadotropin) test be performed 7 to 10 days after intercourse to determine if there is a pregnancy.