Buying perfume for a pregnant woman may not be the best idea since her sense of smell may change due to hormones. While she may love one fragrance usually, during pregnancy, this scent may repulse her. For this reason, it is always important to discuss her fragrance requirements during this time.  In terms of safety, the perfume will not cause any harm to the mother or baby but certain scents may induce nausea, headaches and other physical symptoms.