The list of pregnancy-safe ingredients is longer than the do-not list. For acne, ACOG lists topical benzoyl peroxide, azelaic acid, topical salicylic acid and glycolic acid as over-the-counter ingredients you can use during pregnancy. The do-not list: retinoids (any), salicylic above 2% leave-on, high-dose vitamin C (irritation risk), hydroquinone. When in doubt, ask your OB before introducing a new product. This routine assumes a healthy pregnancy with no specific dermatologic complications.