Boys and girls who want to get pregnant need to meet the conditions of good health, intercourse during ovulation, semen entering the body, and the formation of a fertilized egg. 1. Physical health: women need to have normal ovulation, fallopian tubes, normal thickness of the uterine lining, and no gynecological inflammation. Men need to have a healthy body, and sperm activity and so on. 2. Ovulation: generally ovulation is in the middle of the two menstrual periods, when women usually discharge mature eggs, and intercourse before and after the day of ovulation can increase the probability of conception. 3. Semen into the body: during intercourse, the man needs to ejaculate into the woman’s body before the semen and the egg can be combined. 4. Formation of fertilized egg: Once the semen and the egg combine, a fertilized egg will be formed, and the fertilized egg will lay in the uterine wall of the woman, which means that the woman has successfully become pregnant. In addition, if you are not pregnant for a long period of time, you should consult a doctor to find out the exact cause of your pregnancy.