In the course of outpatient visits, I found that there are many patients who simply do not understand what contraception really is, and there is such a lack of knowledge of gender science among young Chinese women. This article today is written for every girl to read, and I hope you do a good job of contraception and protect yourselves. 1. In vitro ejaculation is the most dangerous form of contraception. To be exact, extracorporeal ejaculation can’t even be called contraception, the contraceptive failure rate is extremely high, and it’s easy to conceive if you’re not careful. At the moment of ejaculation, if the man can not withdraw his penis in time, it will make part of the semen shot in the vagina, leading to pregnancy in the woman. 2. There is no such thing as a “safe period”. Many women call the first 7 days and the last 8 days of their menstrual cycle a safe period, which is actually the luteal phase and early follicular phase in technical terms. For women with a 28-day menstrual cycle, ovulation mostly occurs 14 days before the next menstrual period, but can be greatly influenced by physical conditions, mood swings, etc. Ovulation can be advanced or delayed for several days. For women with irregular menstrual cycles, there is no way to predict ovulation unless they come to the hospital for an ultrasound to monitor their follicles. In some women, the follicles develop too quickly and ovulation occurs just after menstruation, and there are even women who ovulate during their menstrual period. A lot of women are taking a chance that they will not get pregnant, but the result is still pregnant, so this statement is also unscientific, safe period is not safe. 3, you can not use the emergency contraceptive pill as a conventional contraceptive method. First, the possibility of contraceptive failure is greater than the short-acting oral contraceptive pill, the second is a large impact on the body, easy to cause endocrine disruption. 4, more can not be drug abortion / abortion as a contraceptive method. Whether it is a medical abortion or abortion on the female body damage is great, and some even lead to infertility. In China, the convenience of abortion and the lack of knowledge about both sexes, thinking that abortion is just a very simple procedure that will not have any effect on your body, but in fact, this view is wrong, abortion will not only bring you physical damage, such as pelvic inflammatory disease, uterine adhesions, infertility, etc.. Subconsciously, it is also a trauma to your spirit. 5, the recommended contraceptive methods: condoms, birth control rings or short-acting oral contraceptive pills (such as Daying 35, Ursine, etc.). Short-acting contraceptive pills and emergency contraceptives are essentially different, short-acting contraceptive pills one a day, can not be missed, its advantage is that there is no accumulation in the body, a cycle after stopping the pill can directly prepare for pregnancy, the side effects are also very small, is a good way of contraception, especially for women with irregular menstruation and a certain therapeutic effect. For women who do not want to have children, it is recommended to put the IUD, which is more convenient than taking the short-acting pill. Of course, the birth control ring also has the possibility of contraceptive failure, but the probability of this is very small, much smaller than the probability of pregnancy without the ring. 6, once the period is delayed, or the amount of menstruation is not the same as usual, if there is a possibility of pregnancy, please check immediately to see if you are pregnant. The easiest way: early pregnancy test paper, the most accurate way: go to the hospital to check the blood HCG, the earliest can be detected in the blood 1 week after the embryo is laid. After reading today’s article, I hope every girl can protect herself, whether you are now unmarried, or married, should learn to contraception, in addition to a small life is not easy to come, and walk and cherish.