Effects of Various Levels of Luteinizing Hormone and Caprine Follicular Fluid on In Vitro Embryo Production of Shami Goat

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In the current study, the hypothesis of the effects of luteinizing hormone (LH) and follicular fluid (FF) derived from follicles of varying size on in vitro embryo production of the Shami goat breed were tested. The caprine follicular fluid (cFF) was obtained from healthy female’s ovaries by aspiration method and classified into two main classes (follicles with a diameter of ≤ 2mm and ≥3mm). The resulting cFF was added to the culture medium TCM-199 through six Treatments (A, B and C with a source of follicle size of ≤ 2mm; D, E and F with a source of size of ≥3mm). LH was added only to four of the previous Treatments with the levels of 50 µg ml-1 (B and E) and100 µg ml-1 (C and F). Results of the study showed that the oocytes incubated in Treatment F achieved a clear superiority (p=0.001) in the rates of maturation (87.0%), fertilization (80.0%) and cleavage (82.3%). The oocytes incubated in the same Treatment (F) continued to outperform (p= 0.006) by achieving the best rates across cleavage stages at 2-16 cell (16%; the lower value of arrest) and blastocyst (42%). Significant differences (P=0.03) were observed among the rates of Type 1embryos (the highest rate: 45.3%; Treatment F) and Type 3 embryos (the highest rate: 45.1%; Treatment A). No significant differences were observed in the rates of morula and Type 2 embryos. It is advised to add 15% of the cFF derived from follicles with a diameter of ≥3mm and 100 µg of LH ml-1 in the maturation media to obtain higher rates of maturation and cleavage of goat oocytes.