If the first intercourse coincides with ovulation in your menstrual cycle, you are likely to get pregnant. If it is the safe period of the menstrual cycle, pregnancy is less likely. Human pregnancy is the process by which the mature reproductive cells of a man and a woman, both sperm and egg, unite. For women with normal menstrual cycles, the day of ovulation most often occurs about 14 days before the next menstrual period, so it is easy to get pregnant if you have intercourse 1-2 days after ovulation. 3-5 days after menstruation, or 3-5 days before the next menstrual period is relatively safe, called the safe period, safe period coitus pregnancy is less likely. For women who are not planning to get pregnant, it is better to wear a condom for the first time, which is a more economical, safe and reliable method, and it will not affect future conception.