EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Plasma prolactin concentrations and cyclic activity in pony mares during parturition and early lactation



Plasma prolactin concentrations and cyclic activity in pony mares during parturition and early lactation



Journal of Reproduction and Fertility 77(2): 569-574



Five pony mares were blood sampled during late pregnancy, foaling and early lactation. An homologous assay for horse prolactin was used to measure plasma prolactin concentrations in these samples. Regular estimates of cyclic activity were also made. Plasma prolactin concentrations rose markedly in the last week of pregnancy and remained high although variable in early lactation, before declining to basal levels by 1-2 months post partum. All mares showed a post-partum oestrus 7.0 .+-. 0.9 days after parturition. One mare whose foal died shortly after birth showed a rapid decline in plasma prolactin values after death of the foal and an early oestrous period (4 days after parturition). The pattern of prolactin changes reported for the mare are in agreement with those reported for other mammalian species.

(PDF emailed within 0-6 h: $19.90)

Accession: 001431084

Download citation: RISBibTeXText

PMID: 3755475

DOI: 10.1530/jrf.0.0770569



Related references

The effect of phenothiazine and periphenazine on plasma prolactin concentrations in non pregnant pony mares. Journal of Animal Science 66(SUPPL 1): 370, 1988

Variation in plasma concentrations of oestradiol-17 beta and their relationship to those of progesterone, 13,14-dihydro-15-keto-prostaglandin F-2 alpha and oxytocin across pregnancy and at parturition in pony mares. Journal of Reproduction and Fertility 84(2): 635-646, 1988

Plasma prolactin concentrations in mares and their neonates after oxytocin induction of parturition. Domestic Animal Endocrinology 6(2): 101-110, 1989

Effects of pregnancy and lactation on plasma lipid and lipoprotein concentrations, lipoprotein composition and post-heparin lipase activities in Shetland pony mares. Journal of Reproduction and Fertility 97(2): 563-568, 1993

Changes in estrone sulfate concentrations in peripheral plasma of pony mares associated with follicular growth ovulation and early pregnancy. Journal of Reproduction & Fertility 68(2): 481-488, 1983

Changes in oestrone sulphate concentrations in peripheral plasma of Pony mares associated with follicular growth, ovulation and early pregnancy. Journal of Reproduction and Fertility 68(2): 481-487, 1983

Plasma prolactin levels in sows during pregnancy, parturition and early lactation. Journal of Reproduction and Fertility 61(1): 131-134, 1981

Effects of short term stress xylazine tranquilization and anesthetization with xylazine plus ketamine on plasma concentrations of cortisol luteinizing hormone fsh and prolactin in ovariectomized pony mares. Theriogenology 30(5): 937-946, 1988

Effects of induced parturition in goats on immunoglobulin G and chitotriosidase activity in colostrum and plasma and on plasma concentrations of prolactin. Domestic Animal Endocrinology 40(4): 192-196, 2011

Effects of bromocriptine and perphenazine on prolactin and progesterone concentrations in pregnant pony mares during late gestation. Journal of Reproduction and Fertility 92(1): 179-186, 1991

Effects of short-term stress, xylazine tranquilization and anesthetization with xylazine plus ketamine on plasma concentrations of cortisol, luteinizing hormone, follicle stimulating hormone and prolactin in ovariectomized pony mares. Theriogenology 30(5): 937-946, 1988

Concentrations of total proteins and albumins, and AST, ALT and GGT activities in the blood plasma of mares during pregnancy and early lactation. Veterinarski Arhiv 75(3): 195-202, 2005

Total and free plasma concentrations of progesterone, cortisol and oestradiol-17b during pregnancy, parturition and early lactation in sows. Australian Journal of Biological Sciences 37(4 ): 7-76, 1984

Diurnal variation of plasma progestagen concentrations in pony mares. Veterinary Record 102(23): 503-503, 1978