The answers to these questions depend on many factors, including the type of birth control pills and other hormonal contraception and when they are used.
Birth Control Pills Prior to Conception
According to the American College of Obstetrics and Gynecology, taking birth control pills before getting pregnant does not cause early pregnancy loss. If you experienced a miscarriage and were taking oral contraceptives prior to conceiving, that was not the cause. This is a common worry but be assured these two events are not related.
Conceiving While on Birth Control
When used appropriately, most types of birth control pills are considered 98% to 99% effective at preventing pregnancy. Yet sometimes, even with perfect usage, women get pregnant while taking the pill. This is more likely if they forget to take pills, for example, or if they are using medications that decrease the effectiveness of the pill. If you find yourself pregnant while on the pill, you should discontinue the pill.
Using the Pill to End a Pregnancy
The birth control pill is not used to terminate an existing pregnancy. The morning-after pill (post-coital contraception, or “plan B”) comes in multiple formulations including several “birth control pill” formulations. These options do not cause miscarriage or abortion but rather prevent conception in the first place. If you are considering emergency contraception within a few days after unprotected intercourse, talk to a physician or pharmacist right away. They can help guide you through this process safely and effectively.
A Word From Verywell
Despite common misconceptions, there is little scientific evidence that taking birth control pills prior to pregnancy or accidentally taking birth control pills during early pregnancy causes fetal death or birth defects. Still, be sure to discuss your worries and address personal questions about contraception and pregnancy with your doctor.
