Impact of Emergency Contraceptives on Fetal Development: Key Concerns - Obstetrics and Gynecology

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The effects of emergency contraceptive pills on the fetus?


Hello, Doctor Lin: I took medication from November 21 to December 12 to avoid my period before traveling (I forgot the name of the medication).
My menstrual period was from December 14 to December 20.
On December 28, I had unprotected intercourse, and that evening I took a morning-after pill (Escapelle) purchased from a pharmacy.
On January 15, due to a delayed period, I bought a pregnancy test, which showed two lines.
I would like to ask the doctor: Does the contraceptive pill I took from November to December and the morning-after pill on December 28 have any effects on the fetus? If so, what are those effects?

juan, 30~39 year old female. Ask Date: 2016/01/17

Dr. Lin Wenbin reply Obstetrics and Gynecology


There may be an impact, but the physician cannot assert it definitively.
If there is an effect, it could interfere with the endocrine development of the fetus.

Reply Date: 2016/01/17

More Info


The use of emergency contraceptives (ECs) and their potential impact on fetal development is a topic of significant concern for many women, especially those who find themselves in situations where they may be unintentionally pregnant. In your case, you have taken both a prescription contraceptive and an over-the-counter emergency contraceptive (Escapelle) within a short timeframe, and you are understandably anxious about the implications for your developing fetus.

Firstly, it is important to clarify what emergency contraceptives are and how they work. ECs, such as levonorgestrel (the active ingredient in Escapelle), are designed to prevent pregnancy after unprotected intercourse. They primarily work by delaying ovulation, preventing fertilization, or inhibiting implantation of a fertilized egg. It is crucial to note that ECs are not abortifacients; they do not terminate an existing pregnancy.

Research indicates that when taken as directed, emergency contraceptives are safe and do not have teratogenic effects (causing malformations) on a developing fetus if taken during an unrecognized pregnancy. The World Health Organization (WHO) and other health authorities have stated that there is no evidence to suggest that the use of emergency contraceptives has any harmful effects on fetal development. Therefore, if you were already pregnant at the time of taking the emergency contraceptive, it is unlikely to have caused any adverse effects.

In your case, since you had a menstrual period from December 14 to December 20, it is likely that you were not pregnant during that time. The emergency contraceptive you took on December 28 would have been effective in preventing pregnancy from that encounter. However, since you received a positive pregnancy test on January 15, it suggests that you may have conceived prior to taking the emergency contraceptive, specifically during the unprotected intercourse on December 28.

Regarding the potential effects of the contraceptive pills you took earlier (from November 21 to December 12), it is essential to recognize that these medications are also not associated with any known risks to fetal development. Hormonal contraceptives are widely used and have been studied extensively, showing no evidence of causing birth defects or developmental issues when taken before conception.

In summary, based on current medical understanding, both the prescription contraceptive you took earlier and the emergency contraceptive (Escapelle) are not expected to have any negative impact on fetal development. If you have concerns about your pregnancy or the health of your fetus, it is always best to consult with your healthcare provider. They can provide personalized advice and may recommend additional monitoring or testing if necessary.

It is also important to manage any anxiety or stress you may be experiencing regarding your pregnancy. High levels of stress and anxiety can affect your overall well-being, and it is advisable to seek support from healthcare professionals, counselors, or support groups. Maintaining a healthy lifestyle, including proper nutrition, regular prenatal care, and stress management techniques, can contribute positively to your pregnancy experience.

In conclusion, while it is natural to have concerns about medications and their effects during pregnancy, the evidence suggests that the emergency contraceptives you have taken are safe and should not adversely affect your developing fetus. Always feel empowered to discuss your concerns with your healthcare provider, who can offer reassurance and guidance tailored to your specific situation.

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