You can also get pregnant when you have sex without wearing a condom for external ejaculation, because this method of contraception is the least reliable. The main reason is that before ejaculation there will be prostate fluid, and the secreted prostate fluid will drip down into the vagina. This is the first time that you have to wear a condom, because it is recommended that you wear a condom if you have regular menstruation and have intercourse during ovulation. If you do not wear a condom, it is recommended that after intercourse, if the ejaculation is in vitro, you should also take the oral emergency contraceptive pill within 72 hours after intercourse to give contraception, which will be more secure, to avoid pregnancy and eventually need to do abortion surgery, which will cause corresponding harm to the body, so you must do a good job of contraception.