9 research outputs found
The use of plasma AMH in sheep as an endocrine marker of the ovarian respnse to FSH in MOET programs: abstract
Publishe
Determination of Anti-Müllerian hormone plasma concentration can help to select donor sheep for laparoscopic ovum pick-up: abstract
Publishe
Effect of laser-assited embryo biopsy and developmental stage on embryo survival at term in sheep: abstract
Publishe
Effect of a defined or an undefined in vitro maturation medium on cleavage rate and embryo development in sheep
La biopsia embrionaria con láser permite el diagnóstico genético preimplantacional ovino sin reducir la supervivencia a término
Publishe
Effect of the FecXr allele on follicle size and oocyte competence assessed by lopu and IVP of sheep embryos: abstract
Unpublishe
Rendimiento del MOET aplicado al programa de selección de la Rasa Aragonesa de UPRA-Grupo Pastores
Publishe
Relationship between plasma AMH at prepuberty and adulthood in sheep: abstract
Unpublishe
Laparoscopic ovum pick-up (LOPU) in Rasa aragonesa ewes carrying or not the FecXr allele in the BMP15: performance, follicular diameter and effect of the stimulation with FSH
A new polymorphism in the Bone Morphogenetic Protein 15 gene (FecXR
allele) causing increased prolificacy in heterozygous ewes (R+) by an increase in ovulation
rate has been recently described in Rasa Aragonesa ewes. Data from 2,172 follicles
aspirated by the LOPU technique, with and without FSH treatment, in 16 R+ and 16 non
carrier (++) ewes during 11 sessions were analyzed. Without FSH, the number of follicles
present in the ovary was not significantly different between R+ and ++ ewes (9.7 and 9.2,
respectively). FSH treatment led to 17.8 follicles in R+ ewes, mainly increasing 4 and 5 mm
follicles (+11.2% and 9.7%, P<0.0001 for both) while in ++ ewes it produced 15.3 follicles, by
increasing the percentage of 5, 6 and >6 mm follicles (+11.7% P<0.0001, +6.9% P<0.01 and
+5.6% P<0.05, respectively). In conclusion, R+ ewes did not present a higher number of
ovarian follicles, but their follicular population presented a significantly lower diameter.
Further studies are necessary to determine if FSH sensitivity is increased in ewes carrying
this polymorphism