Viagra is a drug that promotes penile engorgement and improves erectile function, and current studies have shown that this drug does not increase the risk of fetal malformations. If an unplanned pregnancy is found during the medication and there is a requirement for fertility, you can come to the hospital for an ultrasound and a blood test for HCG progesterone. If an intrauterine pregnancy is confirmed, take folic acid to prevent fetal neural tube abnormalities in the first trimester of pregnancy and have regular maternity and screening tests thereafter. If you are really worried about the adverse effects of medication on the fetus, or if you do not have any fertility requirements, you can come to the hospital for an ultrasound examination around 42 days after menopause. If intrauterine pregnancy is confirmed, other preoperative examinations can be completed and a medical abortion or abortion can be chosen to terminate the pregnancy under the guidance of the doctor. Generally, the success rate of medical abortion is not very high, about 60%-70%, while the success rate of artificial abortion is higher, and most of them do not need to clear the uterus again, so you can choose the suitable way to terminate pregnancy.