Sagging breasts after pregnancy: why it happens, why breastfeeding isn't the cause, what helps, and changes that need a doctor

Sagging breasts after pregnancy come from the pregnancy itself, not from breastfeeding. Associate Professor Yong Tze Tein, a senior consultant in SGH's obstetrics and gynaecology department, explains that pregnancy hormones make your breasts bigger, and that stretches the ligaments that hold them up, whether or not you go on to breastfeed. Breasts tend to sag a little more with each pregnancy, and smoking and age also play a part. You can't tighten stretched ligaments with a cream, but you can support your breasts with a well-fitted bra, lose any pregnancy weight slowly, and stop smoking. Below: what causes it, what helps, what doesn't, and the breast changes that do need a doctor.

What causes breasts to sag after pregnancy

That last line matters, because fear of sagging puts some mums off breastfeeding. SGH's specialist, who also leads the Association for Breastfeeding Advocacy (Singapore), points out that breastfeeding lowers your risk of breast, ovarian and womb cancer. Our guide to the benefits of breastfeeding sets out what the evidence does and doesn't show.

What helps

• A bra that fits now: your size changes in pregnancy and again when milk comes in. HealthHub suggests buying nursing bras in the last trimester, with clips that open for feeds, and KKH's lactation consultant warns that a tight bra can press on the breast and stop it draining, leading to blocked ducts. Get refitted after you wean. Our guide to nursing clothes compares Singapore prices.
• Slow weight loss: HealthHub calls 1 to 2kg a month a healthy pace and warns against crash diets. Our guide to losing weight after giving birth has a realistic plan.
• Not smoking: SGH's specialist names smoking as one of the main causes of sagging, alongside age.
• Support during exercise: the NHS advises getting measured for a new sports bra after the birth, because your back and cup size are likely to have changed.

What doesn't help

Breast changes that need a doctor

Softer, lower breasts after pregnancy are normal. A change in one breast that's new and different is not something to put down to sagging. NUH lists these signs of breast cancer to get checked:

While you're breastfeeding, a painful red lump with a fever is more likely mastitis, which needs a doctor that day. A lump that lasts after feeds and doesn't change still needs checking; our guide to breast cancer in pregnancy explains how doctors check breasts while you're pregnant or feeding.

If you're thinking about surgery

Some women consider a breast lift once they've finished having children and stopped breastfeeding. A later pregnancy would stretch the breasts again, which is why timing matters. If you're considering it, see a plastic surgeon, and give your body time to settle after weaning first.

Frequently asked questions

Does breastfeeding make your breasts sag?

No. SGH's obstetrics and gynaecology specialist says pregnancy causes the sagging, because breasts enlarge and stretch their supporting ligaments whether or not you breastfeed.

Will my breasts go back to normal after breastfeeding?

They often look softer or smaller after weaning. Breasts tend to sag a little more with each pregnancy, and smoking and age add to it, SGH's specialist says.

Can exercise lift sagging breasts?

Exercise can tone the chest muscles underneath, but it can't shorten stretched ligaments. Wear a well-fitted sports bra when you exercise.

Do firming creams or collagen work?

Neither can shorten stretched ligaments. HPB says eaten collagen is broken down into amino acids like any other protein, and creams act on the skin's surface.

What bra should I wear after giving birth?

A soft, well-fitted nursing bra while you breastfeed, which HealthHub suggests buying in the last trimester, and a refit after weaning. Avoid bras that are tight or dig in.

Is it normal for one breast to look different after breastfeeding?

Breasts are rarely a perfect match. What matters is a new change in one breast: a lump, dimpling, a turned-in nipple or a change in shape should be checked by a doctor, as NUH advises.