A comparative study of ovine placental lactogen and prolactin secretion patterns in genetically dissimilar fetal co-twins.

D. D. Kitts, G. B. Anderson, S. Handwerger, Robert Bondurant, G. H. Stabenfeldt

Research output: Contribution to journalArticle

Abstract

Simultaneous fetal and maternal ovine placental lactogen (oPL) and prolactin (oPRL) measurements were determined from blood samples collected from six mixed breed (MB; gestation = 141.5 +/- .7 d) pregnancies and single Rambouillet (n = 2; Ra gestation = 148 and 149 d) and Finnish Landrace (n = 2; Finn gestation = 141 and 143 d) pregnancies for the purpose of examining a possible relationship between fetal-maternal oPL and oPRL levels in the prepartal period. The MB pregnancies were produced by embryo transfer and consisted of genetically different fetuses co-existing in a common uterine environment. Despite the apparent prematurity of Ra co-twins in MB pregnancies, similar oPL and oPRL patterns during the final 14 d of gestation were observed for both Ra and Finn co-twins. Fetal oPL levels decreased at parturition (range 23 to 90 ng/ml) to approximately 60% of values recorded 8 d prepartum (range 100 to 150 ng/ml) in both fetal siblings. Increases in fetal oPRL concentrations, first observed at approximately 4 d prepartum in all fetuses, reached peak concentrations (40 to 60 ng/ml) at term. Results of this study suggest a similarity in regulation of fetal oPL and oPRL secretion, despite genetic differences for gestation period, in fetuses in the M.B. pregnancy.

Original languageEnglish (US)
Pages (from-to)1696-1702
Number of pages7
JournalJournal of Animal Science
Volume64
Issue number6
DOIs
StatePublished - Jan 1 1987
Externally publishedYes

Fingerprint

choriomammotropin
Placental Lactogen
prolactin
Prolactin
Sheep
pregnancy
secretion
sheep
Pregnancy
fetus
Fetus
Finnsheep
Rambouillet
Mothers
premature birth
gestation period
embryo transfer
Embryo Transfer
parturition

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

A comparative study of ovine placental lactogen and prolactin secretion patterns in genetically dissimilar fetal co-twins. / Kitts, D. D.; Anderson, G. B.; Handwerger, S.; Bondurant, Robert; Stabenfeldt, G. H.

In: Journal of Animal Science, Vol. 64, No. 6, 01.01.1987, p. 1696-1702.

Research output: Contribution to journalArticle

Kitts, D. D. ; Anderson, G. B. ; Handwerger, S. ; Bondurant, Robert ; Stabenfeldt, G. H. / A comparative study of ovine placental lactogen and prolactin secretion patterns in genetically dissimilar fetal co-twins. In: Journal of Animal Science. 1987 ; Vol. 64, No. 6. pp. 1696-1702.
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