Others find that just hearing their baby cry or thinking about the baby is enough to stimulate this reflex. Create a new password. My breasts didn't get bigger or smaller, and I don't think they got any droppier. Most women experience increased tenderness as Breasts before and after preganancy breasts get bigger and heavier. Although most parents find that their sex lives change after the birth of a baby, breastfeeding mothers may notice some specific changes. Why, and what should I do?