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 language | English (US) |
|---|---|
| Pages (from-to) | 1696-1702 |
| Number of pages | 7 |
| Journal | Journal of Animal Science |
| Volume | 64 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jan 1 1987 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - A comparative study of ovine placental lactogen and prolactin secretion patterns in genetically dissimilar fetal co-twins.
AU - Kitts, D. D.
AU - Anderson, G. B.
AU - Handwerger, S.
AU - Bondurant, Robert
AU - Stabenfeldt, G. H.
PY - 1987/1/1
Y1 - 1987/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0023352361&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0023352361&partnerID=8YFLogxK
U2 - 10.2527/jas1987.6461696x
DO - 10.2527/jas1987.6461696x
M3 - Article
C2 - 3597184
AN - SCOPUS:0023352361
VL - 64
SP - 1696
EP - 1702
JO - Journal of Animal Science
JF - Journal of Animal Science
SN - 0021-8812
IS - 6
ER -