The effect of estrus synchronization programmes on parturition time and some reproductive characteristics of Saanen goats

Abstract

The aim of the present study was to determine the effect of estrus synchronization programmes on parturition time and some reproductive characteristics of Saanen goats. Estrus of Saanen goats was synchronized as follows: by use of intravaginal sponges containing 30 mg flugestone acetate for 11 days following IM injection of 500 IU PMSG (group PP; n = 80) or only intravaginal sponges (group P; n = 80) and natural estrus (control; C, n = 50). Forty-eight hours after removing intravaginal sponges, all goats were introduced to Saanen bucks. Kidding rate and litter size of goats in the PP group were higher than those of goats in the C and P groups (P < .05). Neonatal mortality rate of kids from goats in the PP group was found higher than those of goats in the C and P groups (P < .05). The length of kidding period in goats of group C was longer than goats in the P and PP groups (P < .05). Births showed a unimodal distribution, with maximum parturition at midday and minimum parturition at midnight in all goats. The parturition that occurred during daytime hours in goats of P and PP groups was more than goats in the C group (P < .05). The results of this study may suggest that estrus synchronization shortened the length of the kidding period, concentrated parturition time during daylight hours and increased reproductive performance in Saanen goats. ARTICLE HISTORY

Determination of the reproductive characteristics of Saanen goats using estrus synchronization and the growth performances of kids

“…In the present study, litter size was similar to the results of other studies using Saanen goat breeds of Australian origin in Turkey (9,20). This value is higher than the data of other studies (4,6,8,12,14,16,17,19) conducted with goats that were stated to be Saanen goats but which origin is unknown. The average pregnancy rate of Saanen goats in this study was found to be higher than in some studies (4,6,16,19) and lower than in others (9,14,17).…”

“…This value is higher than the data of other studies (4,6,8,12,14,16,17,19) conducted with goats that were stated to be Saanen goats but which origin is unknown. The average pregnancy rate of Saanen goats in this study was found to be higher than in some studies (4,6,16,19) and lower than in others (9,14,17). It is thought that the origin or genotype differences of goats may have affected litter size and pregnancy rate.…”

Poor placental traits reduce kid birth weight in young Saanen dams in the first parity

“…However, the most important problem in crossbreeding studies is viability of offspring (4,5). Previous studies suggested that there are intrinsic factors affecting postnatal mortality of offspring, such as parturition-associated events (6), management-associated factors (5,7,8), breed, parity, birth weight (9), and maternal care (10).…”

The Use of Natural Phenomenon in Obtaining Pregnant Rats and Mice as Experimental Animals with The Same Gestational Ages

“…The use of artificial hormones had been widely used, especially in livestock industries; such as prostaglandin 2/PGF2 and some progesterone derivatives in goats [8,9], or various combinations with other hormones such as oestrogen and gonadotrophin, releasing hormone (GnRH) in cattle [10]. Although hormonal synchronization of oestrus may useful in livestock industries, but in experimental reproductive researches it may affect the values of chemical substance(s) and some characteristics which serve as variable(s) in the research [11,12]. Therefore, natural oestrus synchronization by not utilizing hormonal substances hopefully will result more physiologic conditions of pregnant animal models.…”