Generally speaking, a woman’s period just clean intercourse, there is a possibility of pregnancy, but the chances of pregnancy will be relatively low. Under normal circumstances, a woman’s menstruation usually lasts is 2-8 days, if a woman’s menstruation has just finished in the safe period, this time has not yet reached the ovulation period, so there is usually no egg cell discharge, and will not be successful fertilization. However, this is not 100%. If some patients have longer periods, and ovulation can be affected by many other factors, the possibility of early ovulation cannot be ruled out. When the sperm and the egg combine, then a fertilized egg is formed, at which point there is a pregnancy. In order to avoid accidental pregnancy, in the menstrual period just after the end of the effective contraceptive measures, want to short-term contraceptive couples can use condoms.