The next day after the menstrual period is clean and then the next month’s menstrual period is normal again, usually is not pregnant. Women with regular menstrual cycles, ovulation occurs in about 14 days before the next menstrual period, and before and after ovulation 4 to 5 days are susceptible to pregnancy, in addition to the time is the chances of pregnancy is relatively low, so the second day of menstrual period after intercourse will not necessarily be pregnant, and at the same time, the next month’s menstrual period and normal, means that there is no normal fertilization. Since ovulation can be affected by a variety of factors such as mood, temperature, psychological and other factors, may occur earlier or later phenomenon, so in the absence of fertility needs to have intercourse, need to do a good job of contraception.