Induction of synchronized multiple ovulation in dromedary camels during the early non-breeding season

Publication date: Available online 23 November 2019Source: Small Ruminant ResearchAuthor(s): Marwa A. Khalifa, Ibrahim S. Abd El-Hamid, Sherif A. RatebABSTRACTThe efficiency of two hormonal regimens on inducing synchronized multiple ovulation in camels at the beginning of the non-breeding season in Egypt was investigated. Twenty seven pluriparous camels, Camelus dromedarius, were used during April - May. Initially, each female retained a controlled intra-vaginal drug releaser (CIDR) for 13 consecutive days. One day before CIDRs withdrawal each camel received 750 µg PGF2α intramuscularly (i.m). Immediately after CIDRs removal (day 0), the camels were randomly divided into 3 groups of 9 animals each. The first group served as control (natural ovarian cycle), whereas females of the second and third groups were superovulated either by 2500 i.u eCG or 100 µg GnRH i.m, respectively. At peak ovarian activity (day 12), the females of each group were further divided into two subgroups, where induction of ovulation was carried out either by 5000 iu hCG or 20 µg GnRH i.m, respectively. Additionally, a set of blood samples was obtained from each camel at 0, 120, 150, 180, 210 and 240 min after ovulation induction to monitor incidence of LH surge, and ovulation was confirmed 72 h later by ovarian ultrasonography. The changes in reproductive hormones profiles, blood constituents and enzymatic activities throughout the period of the study were also determined. Total number of ...
Source: Small Ruminant Research - Category: Zoology Source Type: research