Pregnancy and hormonal contraceptives can cause temporary hair loss on the scalp and increased hair growth on the face and body.
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March 1989 in “Proceedings of the British Society of Animal Production” Hormones and daylight changes control when cashmere goats shed their hair.
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January 1997 in “Clinics in Dermatology” Pregnancy can cause skin pigmentation, stretch marks, and changes in hair, nails, and sweat glands, with most resolving after birth.
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October 1996 in “Dermatologic Clinics” Chronic Telogen Effluvium is a hair loss condition in middle-aged women that usually doesn't lead to complete baldness.
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August 1995 in “The journal of experimental zoology/Journal of experimental zoology” Melatonin treatment made ferrets grow their fur earlier and affected their breeding time.