Will taking emergency contraceptive pills affect the results of a pregnancy test?

Nov 14, 2025 Source: Cainiu Health
Dr. Zhang Lu
Introduction
In general, the impact of pregnancy after taking emergency contraceptive pills depends on the specific circumstances. If the embryo develops normally, there is usually no need for excessive concern; however, symptoms such as abdominal pain or bleeding may indicate potential adverse effects of the drug on the pregnancy. During pregnancy, it is important to maintain a regular作息 (daily routine), avoid staying up late and overexertion. Maintain a balanced diet with adequate intake of high-quality protein and fresh fruits and vegetables, and avoid smoking, alcohol, and other harmful substances.

Generally speaking, the impact of pregnancy after taking emergency contraceptive pills depends on specific circumstances and should be evaluated accordingly. If the embryo develops normally, there is usually no need for excessive concern; however, symptoms such as abdominal pain or bleeding may indicate adverse effects of the drug on the pregnancy. Detailed analysis is as follows:

Emergency contraceptive pills primarily work by inhibiting ovulation. If ovulation has already occurred before taking the pill, the drug's impact on an already-formed embryo is generally minimal. Most studies indicate that these medications do not clearly increase the risk of fetal malformations. If prenatal examinations show normal embryonic development, the pregnancy may continue, although enhanced monitoring throughout pregnancy is recommended.

If pregnancy occurs after taking the medication and is accompanied by symptoms such as vaginal bleeding or abdominal pain, it could suggest a threatened miscarriage or abnormal embryonic development caused by the drug. In such cases, ultrasound and blood HCG tests should be performed to assess the situation accurately. If poor embryonic development is confirmed, appropriate measures should be taken under professional medical guidance.

During pregnancy, maintain a regular作息 (daily routine), avoid staying up late and overexertion. Eat a balanced diet rich in high-quality protein and fresh fruits and vegetables, and avoid smoking, alcohol, and other harmful substances. Maintain a positive mood, strictly follow medical advice for all prenatal checkups, and closely monitor fetal development.