Nipple area expansion in mice needs both pregnancy hormones and mechanical strain.
3 citations
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February 2015 in “Mechanisms of development” Hormones and stretching both needed for nipple area skin growth in mice.
July 2022 in “International Journal of Health Sciences (IJHS)” Pregnancy often causes skin changes like darker nipples, swelling in feet, and stretch marks.
Lack of certain cells causes abnormal nipple development and nursing failure.
41 citations
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October 2008 in “The American journal of pathology” Blocking a specific protein signal can make hair grow on mouse nipples.