Lo Loestrin Fe and Pregnancy

The FDA has classified Lo Loestrin Fe as a pregnancy Category X medication, which means it should not be used during pregnancy because it could cause serious problems such as miscarriages or birth defects. If you discover you are pregnant, immediately stop using the pill. However, if you accidentally used it for a while before realizing you were pregnant, serious problems are unlikely.

Can Pregnant Women Take Lo Loestrin Fe?

Lo Loestrin™ Fe (norethindrone/ethinyl estradiol) is a prescription oral contraceptive, also known as a birth control pill. As with all oral contraceptives, Lo Loestrin Fe should not be intentionally used during pregnancy.

What Is Pregnancy Category X?

The U.S. Food and Drug Administration (FDA) uses a category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. Pregnancy Category X is given to medications that should not be used during pregnancy. Often, this is due to serious problems that could occur, such as birth defects or miscarriages.
Although Lo Loestrin Fe is a pregnancy Category X medication, taking this pill during early pregnancy is not likely to cause any serious problems. Large studies have shown no increased risk for birth defects when birth control pills were accidentally taken in early pregnancy. However, there is no good reason to take Lo Loestrin Fe during pregnancy. It should not be used to cause or prevent miscarriages, as it is not effective for these uses.
Keep in mind that if you take Lo Loestrin Fe correctly (without missing any pills), the risk of pregnancy is quite low. However, if you miss your period while taking Lo Loestrin Fe, you may want to consider making sure you are not pregnant (an over-the-counter pregnancy test should be sufficient), especially if you have missed any of the pills. If you miss two periods in a row, you should definitely make sure you are not pregnant.

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Last reviewed by: Kristi Monson, PharmD
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