6 doctors weighed in:

Can femara (letrozole) cause a miscarriage?

6 doctors weighed in
Dr. Barbara Toppin
Obstetrics & Gynecology
3 doctors agree

In brief: Danger to fetus

Femara (letrozole) is used to treat breast cancer in women who have gone through menopause.
It should not be used in women who are or will become pregnant. It has a category x rating which means that it is contraindicated during pregnancy as animal studies have shown toxicity to the developing embryo (baby). It acts to decrease the level of estrogen and that might lead to miscarriage.

In brief: Danger to fetus

Femara (letrozole) is used to treat breast cancer in women who have gone through menopause.
It should not be used in women who are or will become pregnant. It has a category x rating which means that it is contraindicated during pregnancy as animal studies have shown toxicity to the developing embryo (baby). It acts to decrease the level of estrogen and that might lead to miscarriage.
Dr. Barbara Toppin
Dr. Barbara Toppin
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Dr. Cynthia Anderson
Radiation Oncology
1 doctor agrees

In brief: Should not

Femara (letrozole) is only recommended for post-menopausal women.
So, if a woman has not entered menopause yet, she should not take femara (letrozole). Pre-menopausal women usually take tamoxifen, which will often cause a disruption in their menstrual cycles, so getting pregnant is less likely. However, women are not recommended to get pregnant while on tamoxifen.

In brief: Should not

Femara (letrozole) is only recommended for post-menopausal women.
So, if a woman has not entered menopause yet, she should not take femara (letrozole). Pre-menopausal women usually take tamoxifen, which will often cause a disruption in their menstrual cycles, so getting pregnant is less likely. However, women are not recommended to get pregnant while on tamoxifen.
Dr. Cynthia Anderson
Dr. Cynthia Anderson
Thank
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