The Leptin Hormone Administration on the Estrus Intensity and the Appearance Time of Postpartum Estrus in Primiparous Bali Cattle
The Leptin Hormone Administration on the Estrus Intensity and the Appearance Time of Postpartum Estrus in Primiparous Bali Cattle
Desak Nyoman Dewi Indira Laksmi1*, I. Gusti Ngurah Bagus Trilaksana1, I. Wayan Sukernayasa1, Nyoman Oka Widiarta2, I. Wayan Nico Fajar Gunawan1, I Made Merdana3
ABSTRACT
The economic viability of cattle farming depends on achieving the optimal calving interval of approximately one year. Low food intake before and after childbirth will increase the interval from delivery until the next estrus cycle. The mobilization of energy reserves stored in adipose tissue increases when there is a negative energy balance after childbirth. Leptin is a hormone secreted by adipose tissue that plays a role in conveying metabolic information to the hypothalamic-pituitary axis of the ovary. Therefore, this study aims to show that leptin can increase the estrus intensity and the appearance time of postpartum estrus in primiparous cattle. This is a true experiment using a Randomized Pre Post Group Control Design. Furthermore, the leptin administration and observations of the estrus appearance in Bali cattle were conducted at SIPADU and the Breeding Center in Sobangan Village, Mengwi District, Badung Regency. The results showed that the appearance time of estrus was faster with leptin than without it, which was 7.56 days after administration. Meanwhile, with and without leptin, the intensity score remained the same, at 2 (moderate intensity). Primiparas had a longer post-partum estrus performance than pluriparas. Furthermore, leptin increases estrogen production, stimulated by FSH and IGF-1, an aromatase stimulator. Estrus with less clear or moderate intensity is related to hormonal patterns, especially the hormone estrogen level, which plays a role in stimulating estrus.
Keywords | Appearance time of estrus, Estrus intensity, Leptin, Primipara, Postpartum
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