Folliculogenesis, Egg Maturation, and Ovulation

Hafez, E. S. E.; Hafez, B.

doi:10.1002/9781119265306.ch5

Cited by 27 publications

(37 citation statements)

References 7 publications

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“…For sperm tail length, from the beginning of backflow collection (0-15 minutes), the sperm had shorter tails than observed in the insemination dose (46.83 AE 1.29 mm; P < 0.0001), becoming even shorter as time progressed (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) Fig. 2).…”

Section: Experiments 1: Head Morphometry and Flagellum Length In Spermmentioning

confidence: 95%

“…The reproductive cycle stage of animals was assessed once in the laboratory according to ovarian morphology. Only the tracts classified as late follicular phase were used for UF collection [21,22]. After classification, the uterine horns from each sow were separated and the UF was obtained by mechanical pressure from the cranial to the caudal part of the uterus (oviduct to uterine body direction).…”

Section: Uterine Fluid Collectionmentioning

confidence: 99%

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Morphometry of boar sperm head and flagellum in semen backflow after insemination

et al. 2015

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Section: Experiments 1: Head Morphometry and Flagellum Length In Spermmentioning

confidence: 95%

Section: Uterine Fluid Collectionmentioning

confidence: 99%

Morphometry of boar sperm head and flagellum in semen backflow after insemination

et al. 2015

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“…Goats are seasonal breeders (Hafez and Hafez, 2000) and season has important role on reproductive performance of ovine (Carolan et al, 1994). It was reported that oocyte grading and recovery rate (Ramsingh et al, 2013) were affected by ovarian characteristics in different seasons and under various nutritional systems.…”

Section: Introductionmentioning

confidence: 99%

Ovarian Biometry, Oocyte Yield and Oocyte Quality of Baladi Goats as Affected by Ovarian Status in Breeding and Non-Breeding Season

Gabr

Nagy

Ali

2019

Journal of Animal and Poultry Production

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The current study was undertaken to elucidate the effect of ovarian status in breeding and non-breeding season on the ovarian biometry, oocyte yield and oocyte quality of Baladi goats. Ovaries were collected by slicing from slaughter houses and classified with or without CLs during breeding (September-December) and non-breeding (March-July) seasons. Ovaries were weighed and measured, while oocytes were recoverded, yielded and categorized with or without CLs in breeding or non-breeding seasons. Results showed that ovarian weight and biometry (length, width and thickness) were higher in breeding than in non-breeding season, but the differences were significantly only for width. Number of follicles and oocytes/ovary (P<0.001) as well as number/ovary and proportion of oocytes at compact (P<0.0001) and denuded (P<0.05) stage were higher in breeding season than in non-breeding one. Number of degenerated oocytes/ovary was not affected significantly by season, but its proportion was lower (P<0.001) in breeding than in non-breading season. Number/ovary and proportion of partial denuded oocytes and proportion of denuded oocyte were not affected significantly by breeding season. Weight and biometry of ovaries was higher on ovaries bearing CL (CL+) than in non-bearing ones (CL-). Only ovarian width was higher (P<0.001) by 38% in CL+ than in CL-group. Ovaries bearing CL had higher (P<0.05) total follicles and oocyte yield/ovary (P<0.01) as well as oocyte recovery rate (P<0.05) than CL-ovaries. Number of compact, denuded and partial denuded oocytes/ovary was not affected by CL bearing. Number of compact oocytes tended to be greater on ovaries without than with CL. Number of degenerated oocytes/ovary was higher (P<0.05) on CL+ ovaries. Proportion of all oocyte categories was not affected by bearing CL. Finally, the effect of interaction between breeding season and bearing CL on all parameters studied was not significant. In conclusion, the goat ovaries without CL in breeding season yielded better oocyte quality than in non-breeding season, in term of COCs proportion. During non-breeding season, goats oocytes were available to be harvested from slaughtered goat does with acceptable yield and quality.

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“…Little difference exists in the cytologic character of, or the biochemical secretion from, the uterine endometrium for the first 8 to 10 days of both the estrous cycle and early pregnancy. During this 8 to 10 day interval, endometrial function relies on ovarian steroid secretions which are not different between the estrous cycle and pregnancy (Davis and Blair, 1993;Hafez 1993d). Once the pig embryo initiates the synthesis and secretion of massive quantities (ng/day) of estradiol-17P on or about day 11 of gestation a very marked divergence between both the cytology and biochemical secretions of the endometrium is evident between pregnant and cyclic females (Comer 1921;.…”

Section: Embryo Mortalitymentioning

confidence: 99%

The role of the conceptus in determining litter size

Wilson

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Folliculogenesis, Egg Maturation, and Ovulation

Cited by 27 publications

References 7 publications

Morphometry of boar sperm head and flagellum in semen backflow after insemination

Morphometry of boar sperm head and flagellum in semen backflow after insemination

Ovarian Biometry, Oocyte Yield and Oocyte Quality of Baladi Goats as Affected by Ovarian Status in Breeding and Non-Breeding Season

The role of the conceptus in determining litter size

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