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Ever wonder why your bra fits you fine one day, but you’re wrestling with it the next? Boobies are constantly fluctuating in size and shape, so we sat with Dr. Jenna Miller to better understand why.
Breast size changes during the menstrual cycle, pregnancy, menopause, and when there is weight loss or gain.
Hormones are the master puppeteers that manipulate our breast size and menstrual cycles. The two main hormones that play a role in controlling our breast fluctuations are estrogen and progesterone. These are both naturally produced by the female ovaries.
The amount of the hormone produced vary depending on a woman’s:
Menses marks your period (days 1-7). The uterus wall or endometrium begins to shed due to lowered progesterone if no pregnancy occurs. During this phase, the boobs feel lumpier and their texture changes. Milk glands may still be enlarged as the body was prepared for a possible pregnancy.
After ovulation, estrogen starts to decrease and progesterone starts to increase marking the beginning of the luteal phase. This phase ideally lasts from days 14-28. The low levels of estrogen cause the boobs to be asymmetrical and the increasing levels of progesterone cause them to be swollen and tender in preparation for breastfeeding.
Following menses is the follicular phase where estrogen is consistently rising. It peaks right before ovulation at around day 13. During ovulation, the egg is released from the follicle so this is the time you are most fertile. The increased estrogen in this phase makes the skin more elastic meaning your boobs are extra buoyant.
If pregnancy occurs, progesterone levels will not drop during days 1-12, but will remain high to maintain the uterus lining so that the fertilized egg, or the egg fused with the sperm, can develop into a fetus. Progesterone will thus carry on the pregnancy and cause swelling of the breast tissue. During pregnancy, the boob size fluctuates drastically based on the woman’s milk supply, how often she pumps her breast milk, and how much of each hormone is being secreted.
Menopause is marked by the lack of menstruation for a period of 12 months. Estrogen and progesterone both decrease as the body is no longer trying to prepare for pregnancy. This means the tissue is softer and less engorged.
Boob size also fluctuates when a woman gains or loses weight. The breast is composed of fat cells, so it is only natural that when a woman loses or gains weight, her boobs do as well.
Female bodies change all the time whether it's due to our menstrual cycle, pregnancy, menopause, weight gain or weight loss, and we believe that it’s just common sense that our bra should do the same. That’s why we used engineering and tech to create a bra that adapts to your breast size changes.
You can now pre-order the Anesi Bra > CLICK HERE
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