For many women, there's a time each month when their breasts decide to show off, swelling up to possibly even a whole new cup size. Gigi Hadid knows what we're talking about. In a new video for Vogue, the supermodel takes stock of her current cup size, explaining: "My boobs are small right now. They get really big when it's, like, that time of the month. It's true for lots of ladies, and you can thank your period for the monthly momentary boob boost. Cackovic explains that after ovulation—which occurs in the middle of a woman's cycle—the levels of estrogen and progesterone go up in women, and both hormones are responsible for changes in the breasts. Estrogen increases the size of ducts in the breast, tubes that help excrete milk for mothers, and progesterone makes the stroma—connective tissue—of the breast swell.
This is why your boobs WILL sag – and the simple things you can do to keep them perky
8 natural methods for breast enlargement - Evewoman
Why You—And Gigi Hadid—Get Bigger Boobs Before Your Period
Breast size is determined by a combination of genetics, lifestyle, and body weight. Be wary of supplements, herbs, creams, enlargement pumps, and massages that are advertised as natural remedies. There is no evidence that these are effective. Exercises that focus on the pectorals, back, and shoulder muscles can help to firm and tone the chest muscles behind your breast tissue and improve your posture.