Ultrasonographic determination of ovarian follicular. Development in superovulated heifers pretreated with FSH-P at the beginning of the estrous cycle

Ultrasonographic determination of ovarian follicular. Development in superovulated heifers pretreated with FSH-P at the beginning of the estrous cycle

On Day 3 of the estrous cycle (estrus = Day 0), dairy heifers were given either 10 mg i.m. FSH-P (FSH-P primed; n = 9) or a saline vehicle (saline primed; n = 9). On Day 10, all heifers were superovulated with FSH-P (total = 27.7 mg i.m.) in declining doses over 5 d. Heifers were inseminated artific...

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Veröffentlicht in:Theriogenology 1989-06, Vol.31 (6), p.1209-1220
Hauptverfasser: Grasso, F., Guilbault, L.A., Roy, G.L., Lussier, J.G.
Format: Artikel
Sprache:eng
Schlagworte:
cattle
CICLO ESTRAL
CYCLE OESTRAL
DESARROLLO EMBRIONARIO
DEVELOPPEMENT EMBRYONNAIRE
EMBRYONIC DEVELOPMENT
follicles
FSH
FSH-P priming
GENISSE
HEIFERS
HFS
NOVILLA
OESTROUS CYCLE
SUPEROVULACION
SUPEROVULATION
ULTRASON
ULTRASONICS
ULTRASONIDO
ultrasonography
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Zusammenfassung:On Day 3 of the estrous cycle (estrus = Day 0), dairy heifers were given either 10 mg i.m. FSH-P (FSH-P primed; n = 9) or a saline vehicle (saline primed; n = 9). On Day 10, all heifers were superovulated with FSH-P (total = 27.7 mg i.m.) in declining doses over 5 d. Heifers were inseminated artificially at estrus. From Day 2 until estrus, the number and size of follicles >2 mm were monitored daily by ultrasonography. The mean (± SEM) number of corpora lutea (CL) (6.2 ± 1.5 vs 10.7 ± 0.9; P
ISSN:0093-691X
1879-3231
DOI:10.1016/0093-691X(89)90090-3