7 Common Things That Can Change Your Breast Size

Breasts can be confusing. There are those women who gained two whole cup sizes overnight the minute they hit puberty. There are others who only experience weight loss in that area. Why is that? "Genetics make up so much what determines our breast size," says Sherry A. Ross, MD, a women's health expert and author of She-ology. "It's just so individualized, how our breast increases or decreases over time." With that in mind, we asked both Ross and Jessica Shepherd, ob-gyn, to break it down for us and list out the common things (besides implants) that can affect our breast size.

See what they had to say below.

Photo: Urban Outfitters