Hi, It is not safe during pregnancy. Although the amount of radiation needed for a mammogram is small, and the radiation is focused on the breasts, however, radiation should be avoided if possible during pregnancy. Moreover mammography may not be as helpful because of the increased density of the breasts during pregnancy. You should postpone your screening mammogram until after you deliver your baby. There is no documented evidence of mammogram causing any harmful effects on any ova (eggs) that are remaining in the ovaries. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Mohammed Taher Ali, General & Family Physician