Risk to fetus while on tamoxifen?

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Question from Arka: I was taking tamoxifen and then found out I was pregnant! I stopped taking tamoxifen when I found out, but I think I had been pregnant for 2 weeks before I took the pregnancy test. Is there anything I should be worried about?
Answers - Kutluk Oktay, M.D. Again, going back to the previous answer, in the very early part of pregnancy, organ development has not started yet. Therefore, if the exposure was very early on, the likelihood of a birth defect would be very low. However, you may be followed by a high risk OBGYN/pregnancy specialist and may have ultrasound evaluations of the fetus to make sure that no anomalies are developing. But again, this is very unlikely.

The Ask-the-Expert Online Conference called Fertility and Pregnancy featured Kutluk Oktay, M.D. and Leslie Schover, Ph.D. answering your questions about breast cancer treatments that can affect your fertility, options for preserving your fertility, being treated for breast cancer while pregnant, and more.

Editor's Note: This conference took place in September 2008.

The materials presented in these conferences do not necessarily reflect the views of Breastcancer.org. A qualified healthcare professional should be consulted before using any therapeutic product or regimen discussed. All readers should verify all information and data before employing any therapies described here.

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