What is the probability of pregnancy with withdrawal method (coitus interruptus)?

Dec 26, 2022 Source: Cainiu Health
Disease description:

Recently, my close friend told me that the probability of getting pregnant with withdrawal (pulling out) method is relatively low. How likely is pregnancy with the withdrawal method?

Doctor's answer (1)
Dr. Lv Aiming
The probability of pregnancy with withdrawal (coitus interruptus) is generally around 20%. This is because sperm may not timely combine with the egg after ejaculation outside the body; however, a small amount of sperm might still enter the vagina and fertilize the egg, potentially leading to unintended pregnancy. It is recommended to use proper contraceptive methods in daily life, such as condoms, or to insert an intrauterine device (IUD) into the woman's uterus for effective contraception.