Not getting pregnant after 3 months of marriage is normal and does not require treatment. Clinically, it is stipulated that infertility can be diagnosed only when the couple lives together, has a normal sex life and has not been pregnant for more than one year without contraception, and needs to be treated by going to the hospital to check the cause of infertility. It is possible that the lack of pregnancy is caused by not having intercourse during ovulation after 3 months of marriage, and it is also possible that the infertility is caused by excessive psychological stress and anxiety. Therefore, you can buy ovulation test strips or take the basal body temperature and have intercourse at the time of ovulation. If you are younger than 35 years old, you can try to conceive for more than one year and then go for treatment if you do not get pregnant. If you are older than 35 years old, you can try to conceive for six months. If you do not get pregnant after six months, you can go to the hospital in advance to check the causes of infertility, such as examination of fallopian tubes, ovulation monitoring, as well as endocrine examination by blood sampling during menstruation and semen examination of the male partner.