How come I got pregnant even though I used a condom?

Apr 20, 2023 Source: Cainiu Health

Dr. Lv Aiming

Introduction

Pregnancy with condom use refers to conception occurring during sexual intercourse when a condom was worn. This may happen due to tiny tears or defects in the condom, leading to leakage of semen and allowing a small number of sperm to enter the uterus and fallopian tubes. It could also occur if the condom was not worn throughout the entire act, but only put on near ejaculation, resulting in pre-ejaculate or semen spilling into the vagina before protection was used. Additionally, if the condom slips off during intercourse, semen may enter the vagina and fertilize an egg, causing pregnancy.

Pregnancy occurring while using a condom, clinically referred to as conception during sexual intercourse despite condom use, may result from condom breakage, incorrect use of condoms, or condom slippage. Specific causes are analyzed as follows:

1. Condom Breakage

Minor defects in the condom or overly vigorous movements during intercourse may cause the condom to rupture, leading to leakage of semen. Even a small number of sperm entering the uterus and fallopian tubes can result in fertilization and pregnancy.

2. Incorrect Use of Condoms

If the condom is not worn throughout the entire sexual act—for example, only put on near ejaculation—pre-ejaculate or small amounts of leaked semen may remain in the vagina, potentially causing pregnancy.

3. Condom Slippage

If the condom slips off during intercourse, semen may enter the vagina. If this occurs during the ovulation period, sperm may meet the egg, resulting in contraceptive failure and pregnancy.

For individuals without plans for pregnancy, emergency contraception (such as taking emergency contraceptive pills under medical guidance) within 72 hours after intercourse may be used to prevent unintended pregnancy.

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