Follicular response and oocyte production following variations in ovarian stimulation in goats

Prolificacy in small ruminants

“…By manipulation of specific hormonal inputs, follicle recruitment and development that results in ovulation can be increased. 2 Even though, in many studies, the plasma concentrations of Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH) between sheep and goat breeds differing inprolificacydid not significantly vary [3][4][5][6][7][8][9][10][11][12][13] in one of our recent studies, there was a significant difference observed in the pituitary LHβ expression between low prolific Attappady Black and high prolific Malabari goat breeds, with a significantly (P<0.01) high level in Attappady Black. 14 Also, the expression of Follicle Stimulating Hormone Receptor (FSHR) and Luteinizing Hormone/ Choriogonadotropin Receptors (LHCGR)during the periovulatory period and rate of ovulation was observed to be ambiguous in many studies.…”

Comparison of the sequences and expression levels of genes related to follicular development and atresia between prolific and nonprolific goat breeds

“…At the early stages of follicular growth, the gonadotrophins follicle stimulating hormone (FSH) and luteinizing hormone (LH) do not appear to be definite prerequisites for follicular development, but at the later stages, FSH and LH have a central role in follicle growth and maturation through their interactions with receptors (FSHR and LHCGR) in granulosa cells (Hunter, Robinson, Mann, & Webb, ; Webb et al, ). Follicle recruitment and development leading to ovulation can be increased by the manipulation of these hormonal inputs (Mendes et al, ). However, in most studies, no clear differences in the plasma concentrations of LH and FSH between sheep and goat breeds with different ovulation rates have been found (Abdennebi et al, ; Adams, Quirke, Hanrahan, Adams, & Watson, ; Bartlewski et al, ; Bindon, Blanc, Pelletier, Terqui, & Thimonier, ; Bindon et al, ; Cahill et al, ; Cui et al, ; Drouilhet et al, ; Lahlou‐Kassi, Schams, & Glatzel, ; McNatty, Gibb, Dobson, & Thurley, ; Webb & England, ).…”