The Role of Corticoids in Parturition

Adams, W. M.; Wagner, Waldemar

doi:10.1093/biolreprod/3.2.223

Cited by 106 publications

(68 citation statements)

References 20 publications

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“…Substantial changes in cortisol concentration during pregnancy and parturition have been previously reported for many domestic species including the cow, ewe, pig and goat (Adams & Wagner, 1970;Chamley et ai, 1973;Smith et ai, 1973;Baldwin & Stabenfeldt, 1975;Hunter et ai, 1977 Changes in serum oestrone and oestradiol-17ß concentrations reported in this study are similar to those reported for the pig (Guthrie et ai, 1972;Molokwu & Wagner, 1973), cow (Henricks et ai, 1972), and ewe (Chamley et ai, 1973 (1987), working with dromedary camels, reported that oestradiol-17ß concentrations increased progressively during pregnancy from a basal concentration of 20 pg/ml at 2-3 months of pregnancy to about 450 pg/ml during the final stage of gestation. Elias et al (1984a) reported that the oestradiol-17ß concentrations in the dromedary camel had increased dramatically from 338 pg/ml at 10 months of pregnancy to a peak of 606 pg/ml at Week 48 of pregnancy.…”

Section: Discussionmentioning

confidence: 85%

“…In contrast, progesterone concen¬ trations in women and other primates decline during or shortly after parturition (Llauro et ai, 1968;Csapo et ai, 1971). A rise in glucocorticoid concentrations preceding parturition has been reported in the cow (Adams & Wagner, 1970;Smith et ai, 1973), ewe (Thompson, 1973;, and pig (Ash & Heap, 1975;First & Bosc, 1979). Total serum oestrogen and oestradiol-17ß concentrations have been observed to increase in several species before parturition (Bedford et ai, 1972), including the cow (Stabenfeldt et ai, 1970;Peterson et ai, 1975;Hoffman et ai, 1977), ewe (Bedford et ai, 1972; Thompson, 1973), and pig (Wagner & Oxenrider, 1971;Guthrie et ai, 1972;Molokwu & Wagner, 1973).…”

Section: Introductionmentioning

confidence: 97%

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Endocrine changes during pregnancy, parturition and the early post-partum period in the llama (Lama glama)

Leon

Smith²,

Timm³

et al. 1990

Reproduction

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Summary. Mean ( \ m=+-\ s.d.) pregnancy length for the 14 llamas in this study was 350 \ m=+-\ 4\ m=. \ 5 days. Plasma progesterone concentrations increased by 5 days after mating and remained elevated (>2\m=.\0ng/ml) throughout most of pregnancy. At about 2 weeks before parturition, plasma progesterone concentrations began to decline, dropped markedly during the final 24 h before parturition, and returned to basal concentrations (<0\m=.\5ng/ml) by the day of parturition. The combined oestrone + oestradiol-17\g=b\ and oestradiol-17\g=b\ concentrations varied between 6 and 274 pg/ml and 4 and 114 pg/ml, respectively, during the first 9 months of pregnancy. Concentrations increased between 9 months after mating and the end of pregnancy with peak mean concentrations of 827 \ m=+-\ 58 (s.e.m.) pg oestrone + oestradiol-17\g=b\/ml(range: 64\p=n-\1658) and 196 \ m=+-\ 10 pg oestradiol-17\g=b\/ml(31\p=n-\294)during the last week of pregnancy. Concentrations then declined to 87 \ m=+-\14 pg oestrone + oestradiol-17\g=b\/ml(7\p=n-\488) and 25 \ m=+-\5 pg oestradiol17\g=b\/ml (2\m=.\5\p=n-\142)during the first week postpartum. Plasma cortisol concentrations varied between 2\m=.\6and 51\m=.\9 ng/ml (14\m=.\0 \ m=+-\ 0\m=.\5) from mating until 2 weeks before parturition when the concentrations began to decline. Only a slight increase in plasma cortisol concentrations was observed in association with parturition. Plasma triiodothyronine concentrations varied between 0\m=.\5and 4\m=.\5 ng/ml (1\m=.\9 \m=+-\ 0\m=.\1)throughout pregnancy and the periparturient period. Plasma thyroxine concentrations varied between 21\m=.\3and 91\m=.\5ng/ml (56\m=.\5\ m=+-\ 0\m=.\8) from mating until about 39 weeks of pregnancy when they began to decline, from 43\m=.\0 \ m=+-\ 5\m=.\3 ng/ml at 15 days pre partum to 23\m=.\5\m=+-\ 5\m=.\5 ng/ml immediately before parturition, but then increased to 52\m=.\8\ m=+-\ 3\m=.\9 ng/ml by 1 day post partum.

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Section: Discussionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 97%

Endocrine changes during pregnancy, parturition and the early post-partum period in the llama (Lama glama)

Leon

Smith²,

Timm³

et al. 1990

Reproduction

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show abstract

“…Lactation was sufficient to maintain the young (200). Others have supported the ability of adrenalectomized animals to become pregnant (98), and implicated the role of cor-· ticoids in parturition (1).…”

mentioning

confidence: 99%

Adrenal Involvement in Determining the Time of Onset of Puberty in the Rat1

Gorski

Lawton

1973

Endocrinology

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“…Nevertheless some external factors which could suppress, delay or shorten gestation length have been reported by Adams (1969), Adams and Wagner (1970) Estimates of heritability have been reported from 0 to 0.71 by Andersen and Plum (1965) and Plum et al (1965). Konce (1968) Table 2 shows this grouping classification.…”

Section: Gestation Lengthmentioning

confidence: 93%

“…Twenty mg of Azium or 10 mg of Flucort was given to each cow (Adams and Wagner, 1970). can be carried out.…”

mentioning

confidence: 99%