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Research into the biological basis of gender identity is in its infancy, but clues are beginning to emerge.


Doctors report that a regimen of hormones, an antiemetic drug, and pumping gave the woman enough milk production to feed her baby exclusively breastmilk for six weeks.

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image: Hormonal Male Contraceptive to Enter Clinical Trial

Hormonal Male Contraceptive to Enter Clinical Trial

By Jef Akst | December 21, 2017

The gel, which men rub on their upper bodies daily, delivers synthetic progestin to block the testes from producing normal levels of sperm.


image: Hormone Loss Prevents Obesity and Diabetes in Mice

Hormone Loss Prevents Obesity and Diabetes in Mice

By Abby Olena | November 6, 2017

Asprosin—involved in a rare disease called neonatal progeroid syndrome—targets neurons to stimulate appetite, and blocking the hormone wards off weight gain in rodents.


image: Opinion: Toxic Time Bombs

Opinion: Toxic Time Bombs

By Robert Martin | September 25, 2017

Decades of evidence point to the untoward health effects of endocrine disruptor exposures, yet little is being done to regulate the chemicals.


image: Anti-Preeclampsia Hormone Discovered

Anti-Preeclampsia Hormone Discovered

By Ruth Williams | June 29, 2017

A small, placenta-produced peptide fixes the pregnancy-related condition in mice. 

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image: Hormone Released by Bone Suppresses Appetite

Hormone Released by Bone Suppresses Appetite

By Abby Olena | March 8, 2017

A protein secreted by osteoblasts crosses the blood-brain barrier to regulate hunger in mice.


Researchers solve the mystery of 15-year-old mutant ferns with disrupted sex determination.


The public may still believe that male-specific traits, such as high testosterone levels, lead to many of the gender inequalities that exist in society, but science tells a different story.


image: Famed Pediatric Endocrinologist Dies

Famed Pediatric Endocrinologist Dies

By Kerry Grens | December 6, 2016

Melvin Grumbach, a clinician and researcher who described the hormonal dynamics of puberty and numerous endocrine disorders, has passed away at age 90.


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