Is it possible to get pregnant from withdrawal method (coitus interruptus)?

Oct 11, 2022 Source: Cainiu Health
Disease description:

Every time I have sex with my boyfriend, he doesn't like to use condoms and always withdraws before ejaculation. I'm not sure whether I can get pregnant this way. Could you tell me if it's possible to get pregnant from withdrawal method?

Doctor's answer (1)
Dr. Li Mingchuan
Withdrawal (coitus interruptus) can lead to pregnancy. Under normal circumstances, the chance of pregnancy is 1%-3%, while during ovulation, the probability increases to 5%-10%. Some women, especially those without prior sexual experience, may use withdrawal during their first sexual encounter but could still experience unintended pregnancy. It is recommended not to rely on withdrawal as a method of contraception at any time.