Ways Your Breasts Age

As you move through your 20s and 30s, your twins experience some changes.

In your 20s

Your breasts are at their genetically predetermined size, and your breast tissue is at its firmest. This decade is when you're most likely to develop a benign breast lump, such as a cyst or fibroadenoma—a painless, firm mass.

In your early 30s

The collagen that helps keep breasts firm begins to lose elasticity, so most women notice some sagging. If you smoke, the sagging may be more apparent, because chemicals in tobacco break down collagen. A more serious worry: breast cancer. At 30, your risk of the disease is 1 in 257. Monthly breast self-exams and a yearly clinical breast exam by your gyno should be routine.

In your late 30s

Gravity, and any pregnancies, will have made your breasts less dense. Pregnancy can also leave your nipples darker. As for breast cancer, some gynos suggest that a 35+ woman get a baseline mammogram, but all women should get them yearly after 40.

Source: Jennifer Wider, MD, Cosmo Radio Sex-Health Expert

- from Cosmopolitan Magazine, February 2008