2012
DOI: 10.1590/s1516-35982012001200004
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Association of recombinant bovine somatotropin (rBST) with equine chorionic gonadotropin (eCG) on antral follicle count and oocyte production in Holstein and Tabapuã heifers

Abstract: -The objective of this study was to investigate whether the use of rbST and eCG prior to ultrasound-guided follicular aspiration (OPU) improves oocyte yield and quality in Tabapuã and Holstein heifers. The study was conducted in two phases, 20 days apart, in a change-over design. The dominant follicle was ablated two days (D-2) before two treatments: stimulation (6 Holstein and 8 Tabapuã), 500 mg of rbST (Boostin ® ) on D0 and 500 IU of eCG (Folligon) on D2; and control (6 Holstein and 8 Tabapuã), in which hei… Show more

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“…Therefore, reproduction may be controlled by the lysis of the corpus luteum and by inducing a subsequent follicular phase with ovulation (27). Equine chorionic gonadotropin, which is a gonadotropic hormone produced in the chorion of pregnant mares, is widely used to obtain a large number of oocytes by the induction of superovulation in many animals (13,(18)(19)(20)(21)25). In mice, eCG and cloprostenol can promote the secretion of FSH and LH (27).…”
Section: Praca Oryginalnamentioning
confidence: 99%
“…Therefore, reproduction may be controlled by the lysis of the corpus luteum and by inducing a subsequent follicular phase with ovulation (27). Equine chorionic gonadotropin, which is a gonadotropic hormone produced in the chorion of pregnant mares, is widely used to obtain a large number of oocytes by the induction of superovulation in many animals (13,(18)(19)(20)(21)25). In mice, eCG and cloprostenol can promote the secretion of FSH and LH (27).…”
Section: Praca Oryginalnamentioning
confidence: 99%