In vitro ejaculation has the possibility of pregnancy and is a very unreliable method of contraception. It is quite dangerous to try to use external ejaculation as a method of contraception. This is because: 1. When a man is in foreplay, sperm will be discharged When a man is in foreplay or lovemaking, the lubricating fluid (prostate fluid) secreted contains some sperm. Although the number of sperm is relatively small, but as long as the sperm is more vigorous, women will have the possibility of conception. 2, the male in the orgasm, it is difficult to completely control the semen out of the sexual matter, never put too much hope in the man’s ability to control, even before the orgasm pumped out of the body, it is difficult to ensure infallibility. The main feature of the male orgasm is ejaculation, and when orgasm is imminent, a strong pressure is experienced to make it impatient to ejaculate, and it is almost impossible to have complete control. This causes the initial ejaculate to be discharged into the woman’s vagina before the man withdraws his penis from the vagina. The concentration of sperm in this part of the semen is the highest, which is highly likely to lead to pregnancy in the female partner. 3, semen left around the female vaginal opening is also very likely to enter the vagina Don’t underestimate the motility of these sperm! If semen is left around the female vaginal opening, it is also very likely to enter the female reproductive tract and impregnate the female partner. In other words, even if you do not enter the vagina, but ejaculate in the vulva, it is not impossible to get pregnant, the active sperm may also enter the vagina and continue to move towards the uterus. The actual fact is that there is a small amount of sperm in the vas deferens, and during sexual intercourse, the vas deferens will contract and drain into the urethra as sexual excitement increases, and then follow the urethral glandular fluid into the vagina to impregnate the woman. It is thought that the biggest purpose of the reason for external ejaculation is also contraception, and the biggest drawback of external ejaculation is also the extremely low rate of contraception. So, don’t end up hurting your body for the sake of simplicity, saving time and momentary pleasure. It’s important to take a scientific approach to contraception. Warm tips: 1. If there is a delay in menstruation after in vitro ejaculation, make sure to have a pregnancy related check in time; 2. It is recommended that at no time, do not take the method of in vitro ejaculation for contraception, it is really unreliable! References: [1] Wen Jie, six women must understand the sexual health myths. [2] Li Yanfeng, In vitro ejaculation is not enough. Family Medicine (above),2013:47.