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Temperature-Dependent Sex Determination in Reptiles
By: Karla T. Moeller
| Published: Feb 01, 2013
The sex of a reptile embryo partly results from the production of sex hormones during development, and one process to produce those hormones depends…
Sex DifferentiationReproductionAdaptationfetal developmentEmbryology
Edgar Allen and Edward A. Doisy's Extraction of Estrogen from Ovarian Follicles, (1923)
By: Brendan Van Iten
| Published: Mar 02, 2017
In the early 1920s, researchers Edgar Allen and Edward Adelbert Doisy conducted an experiment that demonstrated that ovarian follicles, which produce…
OvariesCorpus LuteumEndometriumEstrogenHormones, Sex
"The Adaptive Significance of Temperature-Dependent Sex Determination in a Reptile" (2008), by Daniel Warner and Richard Shine
By: Karla Moeller
| Published: Oct 07, 2013
In 2008 researchers Daniel Warner and Richard Shine tested the Charnov-Bull model by conducting experiments on the Jacky dragon (Amphibolurus…
ExperimentsSex DifferentiationReproductionAdaptationfetal development
Diethylstilbestrol (DES) in the US
By: Alexis Abboud
| Published: Mar 23, 2015
Diethylstilbestrol (DES) is an artificially created hormone first synthesized in the late 1930s. Doctors widely prescribed DES first to pregnant…
DiethylstilbestrolDiethylstilbestrol--Side effectsDiethylstilbestrol--CarcinogenicityPregnancyEstrogen
Estrogen and the Menstrual Cycle in Humans
By: Brendan Van Iten
| Published: Jun 22, 2016
Estrogen is the primary sex hormone in women and it functions during the reproductive menstrual cycle. Women have three major types of estrogen:…
Menstrual CycleOral contraceptivesEstrogenEstradiolEstrone
"The Premenstrual Syndrome" (1953), by Raymond Greene and Katharina Dalton
By: Bianca E. Zietal
| Published: Jun 23, 2017
In 1953, Raymond Greene and Katharina Dalton, who were doctors in the UK, published The Premenstrual Syndrome in the British Medical Journal. In…
LiteraturePremenstrual syndromeMigraineMenstruationMenstruation disorders