English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Examination of serially sectioned conceptuses from ovariectomized female guinea pigs 12-16 days pregnant is reported. Ovariectomy was performed on Day 4 or 5 of pregnancy. Colcemid was administered 1 mg/kg body weight before death to facilitate comparisons of cell divisions. Progesterone was given in some cases to examine its effect on pregnancies of ovariectomized females. From Day 12 a conspicuous de generation of part of the decidua was seen to occur interfering with normal development in the adjacent placenta. Total collapse of the decidua with massive hemorrhage on Day 16 abolished surviving pregnancies. In the unmated guinea pig the deciduoma breaks down at the end of the 16-day cycle when corpora lutea regress before the next estrus. Progesterone in adequate doses given early in pregnancy to ovarietomized guniea pigs can prevent decidual degeneration. In cases where progesterone had been deferred until Day 14 areas of decidual deg eneration persist for some days.

RETARDED EMBRYONIC DEVELOPMENT AND PREGNANCY TERMINATION IN OVARIECTOMIZED GUINEA-PIGS: PROGESTERONE DEFICIENCY AND DECIDUAL COLLAPSE