Why It's Natural That Your Breast Size Fluctuates

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:

  1. BODY TYPE
  2. DAY OF MENSTRUAL CYCLE
  3. AGE
  4. USAGE OF BIRTH CONTROL
  5. PREGNANCY

THREE PHASES OF THE MENSTRUAL CYCLE

There are three phases that occur during the menstrual cycle: menses, the follicu­lar phase, and the luteal phase.

1. MENSES PHASE

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.

     2. LUTEAL PHASE

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 causes them to be swollen and tender in preparation for breastfeeding.

3. FOLLICULAR PHASE

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.

 

PREGNANCY

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

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.

 

WEIGHT GAIN OR LOSS

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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