Ovulation and ovulation day are calculated according to the menstrual cycle. The normal menstrual cycle is about 28 days, and the ovulation day is about 14 days before the next menstrual period. If you are preparing for pregnancy, it is recommended to increase the number of sexual intercourse during the ovulation period to facilitate better union of sperm and egg and improve the chances of conception, other than the ovulation period, which is a safe period, the chance of pregnancy is relatively small if you have sex during the safe period. If you don’t want to have a baby for the time being, it is advisable to take condoms for contraception during sex, which is more effective and can play a role in preventing sexually transmitted diseases, have a normal sex life, especially during ovulation to increase the number of sexual intercourse, a year without pregnancy is considered infertility, the couple needs to go to the hospital in time for the relevant examination.