The effect of the absence or presence of a corpus luteum on the ovarian follicular population and serum oestradiol concentrations during the estrous cycle in Sanjabi ewes

Shabankareh, H. Karami; Habibizad, J.; Sarsaifi, Kazhal; Cheghamirza, Kianoosh; Jasemi, V. Kazemein

doi:10.1016/j.smallrumres.2010.06.002

Cited by 11 publications

(6 citation statements)

References 36 publications

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“…Besides the inhibin produced by the follicle, inhibin secreted by the CL leads to the demise of all follicles that reached the recruitment phase except for the dominant follicle (Lonergan 2011). Both the effect of progesterone as well as the one of inhibin appear to be absent in ovaries without CL, which may lead to a more appropriate follicular fluid that provides better conditions of oocyte maturation, when compared to that in ovaries with a CL (Shabankareh et al 2010;Lonergan 2011), as high progesterone concentrations in the follicular fluid and an active expression of progesterone receptors in the cumulus cells affect the maturation and developmental competence of COCs (Robker et al 2000;Urrego et al 2015). Another factor involved in oocyte quality related to the presence of a CL is the ovarian vascularity.…”

Section: Discussionmentioning

confidence: 99%

Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

Quezada‐Casasola

Martínez-Armendáriz²,

Itzá-Ortíz

et al. 2018

Journal of Applied Animal Research

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Trypan Blue (TB) and Brilliant Cresyl Blue (BCB) are used to select and determine viability and competence of oocytes, however, the effects of corpora lutea on cumulus expansion during in vitro maturation are still undetermined. Cumulus-oocytes complexes (COCs) from ovaries with ipsilateral (ICL), contralateral (CCL) and without corpora lutea in either ovary (OCL) were selected by visual examination, TB and BCB staining, and matured in vitro to evaluate cumulus expansion. The overall percentage of visually selected COCs was similar in ICL, CCL and OCL (P > 0.05). Proportions of live and mature COCs were similar in all groups (P > 0.05). The overall percentage of BCB+ COCs was 70.1%. BCB+ ICL COCs had less cumulus expansion (60.5%) than BCB+ CCL and OCL COCs (75.7 and 71.4%, respectively; P < 0.01). BCB− ICL COCs had less cumulus expansion (20.0%) than BCB− CCL and OCL (39.7 and 46.1%; P < 0.01). BCB+ CCL and OCL COCs showed the highest cumulus expansion index (P < 0.01). Presence of corpus luteum in the ovary affects negatively cumulus cells expansion. TB and BCB staining facilitate the selection of oocytes with higher degrees of cumulus expansion.

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Section: Discussionmentioning

confidence: 99%

Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

Quezada‐Casasola

Martínez-Armendáriz²,

Itzá-Ortíz

et al. 2018

Journal of Applied Animal Research

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“…Autumn seemed to be the most favorable season for the function of the corpora lutea. The characteristics of follicular populations during the estrous cycle of Sanjabi ewes have been studied by Shabankareh et al (2010). From day 1 to day 16 after ovulation, a significant day effect for the mean total number of follicles was recorded (P<0.01).…”

Section: Femalementioning

confidence: 99%

A review of morphological characteristics relating to the production and reproduction of fat-tailed sheep breeds

Pourlis

2011

Trop Anim Health Prod

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The purpose of this study is to survey the literature pertinent to some morphological traits which are related with the production and reproduction of fat-tailed sheep breeds. The fat-tailed breeds were identified according to Food and Agriculture Organization databases. Articles referring to all these sheep breeds were evaluated. The morphology of udders and their measurable variables were collected and described. The particularities of pelt and fleece features which are important from an economic point of view were summarized. Linear, planar, and spatial parameters of body, slaughter, and carcass factors were compared at various ages of breeding. Testicular dimensions and semen characteristics were recorded. Their relationships with productive and reproductive performance were discussed. The pattern of ovarian follicle development and the involution of the genital tract were assessed from the anatomical point of view in normal and untreated animals. The data presented here provide useful baseline information on the normal morphological aspects which are important in the animal production of these breeds.

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“…Nandi et al (2000) demonstrated that the presence of CL on the ovary reduced both oocyte recovery rate and quality of oocytes. On the other hand, Karami Shabankareh et al (2010) suggested that serum oestradiol concentration and follicular population were mainly related to the presence or absence of a corpus luteum. In addition, Gonzalez et al (2001) demonstrated that the corpus luteum had a local effect on ovarian follicular function and morphological features in goats.…”

Section: Introductionmentioning

confidence: 99%

The influence of the corpus luteum on metabolites composition of follicular fluid from different sized follicles and their relationship to serum concentrations in dairy cows

Shabankareh

Kor

Hajarian

2013

Animal Reproduction Science

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The effect of the absence or presence of a corpus luteum on the ovarian follicular population and serum oestradiol concentrations during the estrous cycle in Sanjabi ewes

Cited by 11 publications

References 36 publications

Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

A review of morphological characteristics relating to the production and reproduction of fat-tailed sheep breeds

The influence of the corpus luteum on metabolites composition of follicular fluid from different sized follicles and their relationship to serum concentrations in dairy cows

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