Nature

Levels of Thyroid and Thyrotrophic Hormones in the Blood of Rats at Various Stages of the Œstrous Cycle

A COMPARISON was made between the levels of thyroid and thyrotrophic hormones in the blood of female albino rats during the four stages of the œstrous cycle. The procedure used was that adopted by ...
JSTOR Daily

Mitotic Activity in the Adult Female Mouse, Mus musculus L. A Study of Its Relation to the Oestrous Cycle in Normal and Abnormal Conditions

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, Vol. 231, No. 585 (May 21, 1946), pp. 453-516 (72 pages) A survey has been made of the mitotic activity of the ...
Science Daily

Swamp wallabies conceive new embryo before birth -- a unique reproductive strategy

Among marsupials (who form a second taxonomic branch of mammals), gestation in most macropodids encompasses almost the entire duration of the oestrous cycle. The swamp wallaby takes this one step ...
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On the Occurrence of the Oestrous Cycle after X-Ray Sterilisation. Part III.--The Periodicity of Oestrus after Sterilisation of the Adult

The Royal Society is a self-governing Fellowship of many of the world's most distinguished scientists drawn from all areas of science, engineering and medicine, and is the oldest scientific academy in ...