Weight loss or gain: Weight loss or weight gain can be associated with breast size. Additionally, breasts may be slightly fuller during menstrual cycle.
Answered 6/11/2013
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Hormones : Breasts may increase in size before your period because the burst of hormones with ovulation activate the breast gland to begin working, swelling and getting easy to produce milk ( should you become pregnant ). When you don't become pregnant and menstruate, the effect goes away and your breasts decrease in size.
Answered 5/21/2017
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