Boobs of growing baby

From pregnancy, through breastfeeding, to after weaning, our experts explain how your breasts change — plus we give you tips on caring for them along the way. Read on to find out what to expect as you journey through the trimesters, breastfeed your baby, and eventually wean her. Surging hormones and a shift in breast structure mean your nipples and breasts may feel sensitive and tender from as early as three or four weeks. Some mums-to-be have sore breasts during pregnancy right up until the birth, but for most it subsides after the first trimester. Your breasts might not actually grow much until shortly before — or even after — the birth.