Wearing a condom halfway through the process does not completely rule out the possibility of pregnancy and is still a high-risk sexual activity. When the male penis becomes erect with sexual excitement, it secretes a clear, alkaline secretion consisting of prostatic fluid, paraurethral gland secretion and urethral bulb gland secretion and a small amount of semen accumulated in the vas deferens. This spillage of sperm that occurs before ejaculation is uncontrollable, so even if a condom is worn before ejaculation, the sperm that enters the vagina in advance can still lead to the possibility of an unwanted pregnancy. For women, abortion is quite harmful to the body, so if there is no intention to conceive, it is better to wear a condom for contraception throughout. If you are worried about pregnancy and intercourse has not exceeded 72 hours, you can take oral emergency contraceptive pills for contraception; if it has exceeded 72 hours and the next period is delayed for more than seven days without coming, you can take a morning urine pregnancy test to detect whether you are pregnant.