The last menstrual period April 22, if the interval from the last menstrual period has more than 30 days, it is possible to be able to detect pregnancy. When a woman has intercourse during ovulation, there is a certain probability that the sperm and egg will be fertilized to form a fertilized egg, which will be implanted in the uterine lining about one week after intercourse, and this will cause the woman’s body to secrete human chorionic gonadotropin in the blood. At this time, you can determine whether you are pregnant by detecting human chorionic gonadotropin in the blood, but if you want to detect human chorionic gonadotropin levels in the urine, you generally need to have intercourse for more than 10 days before you can detect it. Therefore, if a woman’s last menstrual period is on April 22, it is very likely that she will be able to detect pregnancy if there is a gap of more than 30 days between her last menstrual periods. It is recommended that women who experience delayed menstruation should go to the hospital as soon as possible to see if there is a possibility of pregnancy.