What is the likelihood of pregnancy with coitus interruptus (withdrawal method)?
May 16, 2022
Source: Cainiu Health
Dr. Chen Zhe
Introduction
Study results indicate that the failure rate of withdrawal (coitus interruptus) is approximately 15%–28%, resulting in a higher risk of pregnancy compared with short-term hormonal contraceptives or condom use. Withdrawal refers to the practice whereby the male withdraws his penis from the vagina before orgasm or ejaculation. During this process, small amounts of semen may be released; moreover, even if ejaculation occurs outside the vaginal opening, sperm may still enter the uterine cavity.
In daily life, some young couples—due to inadequate contraceptive measures—rely on coitus interruptus (withdrawal) as a method to prevent pregnancy in the female partner. But what is the actual risk of pregnancy with this method?
What is the Pregnancy Risk with Coitus Interruptus?
Research indicates that the failure rate of coitus interruptus ranges from approximately 15% to 28%. Compared with more reliable methods—such as oral contraceptives or condom use—this method carries a significantly higher risk of unintended pregnancy. Coitus interruptus refers to the practice whereby the male withdraws his penis from the vagina before ejaculation. However, even prior to full ejaculation, small amounts of pre-ejaculate fluid—potentially containing viable sperm—may be released. Furthermore, if semen is deposited near the external genitalia, sperm may still migrate into the vaginal canal and subsequently reach the uterine cavity. If withdrawal is delayed or improperly timed, some semen may enter the vagina, resulting in pregnancy. Additionally, repeated reliance on coitus interruptus may contribute to sexual dysfunction—including premature ejaculation and erectile dysfunction—due to chronic overstimulation and subsequent neural fatigue. Over time, this can impair sexual coordination and offers no protection against sexually transmitted infections (STIs), including HIV/AIDS. For couples without immediate plans for conception, healthcare professionals strongly recommend using evidence-based contraceptive methods.
The simplest and most accessible way to determine whether pregnancy has occurred is through an over-the-counter pregnancy test—commonly known as a urine-based early pregnancy test strip. These tests detect human chorionic gonadotropin (hCG), a hormone produced by the placenta shortly after implantation. A positive result reflects elevated hCG levels in the urine. For optimal accuracy, testing should be performed using first-morning urine approximately 11–14 days after fertilization. If the initial test yields a negative result but pregnancy remains suspected, it is advisable to repeat the test one week later; for greater reliability, retesting three weeks post-fertilization is recommended. In cases where the exact timing of ovulation and fertilization is unknown, the menstrual cycle can serve as a practical reference point for determining the appropriate timing for urine testing.
In routine practice, it is essential to employ effective contraceptive measures during sexual intercourse to prevent unintended pregnancy and safeguard the woman’s physical health. We hope this information proves helpful to you!
