Breast cancer incidence increases with age and due to the current trend to delay pregnancy later in life, the rare coincidence of breast cancer and pregnancy has become more frequent.Gestational breast cancer (GBC) constitutes around 3-4% of breast cancer with around 1∶3,000 women diagnosed by breast cancer during their pregnancy course.GBC has been regarded as particularly aggressive but whether or not the maternal prognosis is worse has been a matter of debate.Based on the published case-control studies, the prognosis of women with GBC does not appear to differ from the non-pregnant patients of the same age and stage of the disease.A meta-analysis is currently underway by our group to confirm this observation.