Depende sa product, mama! If it's Mama's Choice Hair Loss Treatment Shampoo & Conditioner, oo, safe yan for pregnancy kasi specifically formulated para maging pregnancy-safe at breastfeeding-safe pa. Pero kung ibang brand, better check the ingredients first or ask your OB to be sure, maraming products na may chemicals na hindi ideal during pregnancy, so mas safe kung mag-confirm lang. I used it during my pregnancy din and sobrang effective, plus walang worry sa ingredients!