The effect of melatonin on lambing and litter size in milking ewes after advancing the breeding season with progestagen and PMSG followed by artificial insemination

• Published in: Small ruminant research Vol. 31; no. 1; pp. 79 - 81
• Main Authors: Laliotis, V, Vosniakou, A, Zafrakas, A, Lymberopoulos, A, Alifakiotis, T
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.1998
• Subjects: anestrus; Artificial insemination; breeding season; controlled release; estrus synchronization; ewes; lambing rate; litter size; Melatonin; Milking ewe; PMSG; pregnant mare serum gonadotropin; Progestagen; progestational hormones; repeat breeders; Greece; Melatonin; PMSG; Milking ewe; Artificial insemination; Progestagen

To advance the breeding season in an indigenous sheep breed of Greece, 207 multiparous milking ewes were used and allocated randomly in two groups, group A of 114 and group B of 93 ewes, during the anoestrous period (spring). All ewes received intravaginal sponges impregnated with progestagen (60 mg...