Your breast shape changes through your cycle

/Your breast shape changes through your cycle

Your breast shape changes through your cycle

My HormonologyStrange, but true: Your breasts change shape throughout the course of your monthly cycle.

According to a study in the journal Ethology and Sociobiology, your breasts are more asymmetrical during Week 1 (your period week) and Week 4 (your premenstrual week) when estrogen is low.

They’re more symmetrical during Week 2 (which starts 8 days after the onset of your period) when estrogen is high.

And they’re at their most symmetrical during ovulation at the end of Week 2 (the mid-point of your cycle).

Why the fluctuation in shape? The researchers theorize it may be a subtle cue to men that indicates when you’re approaching the most fertile phase of your cycle.

By | 2018-08-12T16:28:46+00:00 July 19th, 2013|hormone research, hormonology tip|0 Comments

About the Author:

Gabrielle Lichterman is the founder of Hormonology, author of 28 Days: What Your Cycle Reveals about Your Love Life, Moods and Potential and creator of the popular Hormone Horoscope menstrual cycle tracker apps. In 2005, Gabrielle pioneered the growing movement among women to live in sync with their menstrual cycles and learn about the many ways their hormones impact their moods, health and behavior with the publication of her book, 28 Days. She's also a longtime women's health journalist whose articles have been published in major publications around the globe. Gabrielle's new updated and expanded version of 28 Days is due to be published December 2018. You can help get this book published by participating in her fundraiser at

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