The choice of good contraceptive measures has a direct impact on women’s reproductive health. The ideal contraceptive method should be in line with the principles of safety, effectiveness, simplicity, practicality, economy, no adverse effects on sexual life, sexual physiology and even sexual psychology, for both men and women are acceptable and happy to use lasting. A, the current contraceptive methods and advantages and disadvantages 1, (active) intrauterine device (IUD): the mechanism is complex and not fully understood. May be local tissue to foreign body tissue or toxicity) response (1) advantages: containing Cu2 + IUD T V umbrella type more than 90%, containing drug IUD more than 99%. (2) disadvantages: contraindications 1 ~ 9; generally only last about 5 years need to be replaced, a few 20 years; side effects are irregular vaginal bleeding, leucorrhea, lower abdominal distension; complications 1 ~ 4. 2, hormonal contraception (oral 21-day contraceptive pill): increase the body’s estrogen and progesterone content, feedback to inhibit ovulation, change the natural development of the endometrium, maturation process. (1) Advantages: reliable effect. (2) Disadvantages: contraindications 1 ~ 8; possible side effects: 1 ~ 10; long time to take the pill. 3.Condom: more reliable; discomfort. 4, sterilization: reliable; anti-physiological. 5, emergency contraceptive pills: temporary, random; “yuting” “after the fixed after the Nuo” as the representative of the emergency contraceptive pills may lead to irregular vaginal bleeding or even menstrual disorders, the former after ovulation and may become a birth control pill. Is there a better way of contraception? If you have regular menstruation, take the pill in small doses for 2~3 days in the middle of your period without panic, without worrying about irregular bleeding and without affecting your married life, are you still not willing to accept and try this contraceptive method? Principle: The simultaneous development and maturation of the endometrium of the uterine cavity is required for implantation. This requires the estrogen and progesterone, which play a decisive role in the endometrium, to act in strict synergy with the endometrium. Since progesterone is only produced by the corpus luteum after ovulation, and secreted from low to high (about 1 week) and then from high to low (about 1 week), it is only necessary to use a small dose of mifepristone to partially or mostly block the effect of progesterone on the endometrium during the “low to high” secretion phase, which should interfere with the development and maturation of the endometrium, thus This will prevent the fertilization of the egg and achieve the purpose of contraception. Advantages and disadvantages: small dose, short duration of administration (more than 2/3 less than conventional contraceptives), short half-life of 26-30 hours, does not inhibit ovulation, does not change the natural secretion of hormones in the body, does not increase or decrease the hormone content in the body, does not affect the regularity of the menstrual cycle, does not increase the chance of ectopic pregnancy, has wide applicability, and has few contraindications. Contraindications: few. Endometrial diseases, taking drugs with synergistic effects, irregular menstrual cycles. Side effects: few or none. No long-term medication, no IUD, no condom, simple contraception without harming the body.