Frequent pregnancies should be prevented through the use of condoms, oral contraceptive pills, and surgery. 1. Use of condoms: Condoms are used to prevent sperm from entering the fallopian tubes and prevent sperm from combining with the egg, and they have no side effects. If you need to use condoms, you should use them throughout your sexual life. 2. Oral contraceptive pills: Contraceptive pills are mainly used to prevent the embryo from settling in the uterus by making the endometrium enter the secretion phase early through progesterone, and inhibit the central nervous system, which in turn inhibits ovulation and thus plays a role in contraception. However, contraceptive pills should not be taken too much, which may easily lead to irregular menstruation and endocrine disorders. 3. Surgery: Surgery can include ligation and IUD. If a woman does not have a need for pregnancy in the future, she can have her fallopian tubes ligated surgically, so that the sperm and the egg can not be combined together, preventing fertilization. An IUD is an intrauterine device (IUD) placed in the uterus to prevent fertilization by preventing the fertilized egg from settling in the uterine cavity. If a woman is susceptible to pregnancy and wants to avoid pregnancy, she should choose a suitable contraceptive method according to her own needs and her own physical condition, and can be guided by a doctor for scientific contraception.