PMID: 8943773Oct 1, 1996Paper

The effects of cortisol on the growth rate of the sheep fetus during late gestation

The Journal of Endocrinology
Abigail L FowdenAlison J Forhead

Abstract

Using indwelling crown-rump length (CRL)-measuring devices, the growth rate of sheep fetuses was monitored during late gestation and after experimental manipulation of fetal plasma cortisol by exogenous infusion and fetal adrenalectomy. In intact control fetuses, the increment in CRL declined progressively during the last 20-25 days of gestation: mean +/- S.E.M. values fell from 5.5 +/- 0.4 mm/day (n = 12) at 21-25 days before delivery to 2.5 +/- 0.3 mm/day (n = 12) in the last 5 days before birth (P < 0.01). These changes closely parallelled the normal prepartum increase in fetal plasma cortisol which rose from 19.3 +/- 3.3 nmol/l (n = 10) at 21-25 days before birth to 177.4 +/- 19.0 nmol/l (n = 10) in the final 5 days before delivery (P < 0.01). When this cortisol surge was prevented by fetal adrenalectomy, there was no decrease in CRL increment towards normal term: mean CRL increment in the 5 days before normal term (4.8 +/- 0.6 mm/day, n = 5) was similar to that observed at 21-25 days before term (4.7 +/- 0.4 mm/day, n = 5). At delivery at term, the body weight (4.116 +/- 0.280 kg, n = 5) and CRL (51.9 +/- 1.7 cm, n = 5) of the adrenalectomized fetuses were significantly greater than the corresponding values in their sham-o...Continue Reading

Citations

Jan 8, 2004·American Journal of Obstetrics and Gynecology·Timothy J M MossJohn P Newnham
May 5, 1999·Life Sciences·H G KlemckeR K Christenson
Sep 18, 2003·Placenta·Abigail L Fowden
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