Clinical use of human chorionic gonadotropin in dairy cows: an update

Theriogenology
F De RensisM Techakumpu

Abstract

Human chorionic gonadotropin (hCG) has a potent luteinizing hormone (LH)-like effect in cattle that extends the life span of the corpus luteum (CL) and increases progesterone synthesis, induces ovulation throughout the estrous cycle, promotes the formation of accessory corpora lutea when applied in the early luteal phase, and modifies follicular wave dynamics increasing the frequency of three-wave dominant follicular cycles. As hCG acts on ovarian cells independently of the pituitary gland and its effect is longer lasting than that produced by endogenous LH release, use of hCG rather than gonadotropin-releasing hormone (GnRH) could be targeted at populations of subfertile cows. This review describes the clinical use of hCG to improve the reproductive performance of dairy cows. In addition, we describe recent developments in the therapeutic use of hCG and studies addressing the benefits of including hCG in estrus and ovulation synchronization protocols. Our review ends with a critical discussion of how earlier findings related to ovarian responses to hCG treatment can be interpreted in the light of recent advances in the clinical applications of hCG.

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Citations

May 11, 2012·Reproduction : the Official Journal of the Society for the Study of Fertility·M SalehW Holtz
Mar 20, 2013·Animal : an International Journal of Animal Bioscience·A TorresL Lopes-da-Costa
Oct 23, 2015·Animal Reproduction Science·J Manuel PalominoGregg P Adams
Jan 17, 2013·Reproduction in Domestic Animals = Zuchthygiene·A TorresL Lopes-da-Costa
Jan 25, 2014·Reproduction in Domestic Animals = Zuchthygiene·F De Rensis, F López-Gatius
Sep 16, 2014·Reproduction in Domestic Animals = Zuchthygiene·M Saint-DizierS Chastant-Maillard
Apr 13, 2015·Tropical Animal Health and Production·Chainarong NavanukrawSuneerat Aiumlamai
Apr 22, 2015·Animal Reproduction Science·Mufeed A Alnimer, Ahmad I Shamoun
Oct 1, 2011·Theriogenology·M C WiltbankA Gumen
Feb 1, 2015·Reproduction, Fertility, and Development·Pat LonerganThomas Spencer
Jan 15, 2021·Animals : an Open Access Journal From MDPI·Irina Garcia-Ispierto, Fernando López-Gatius
Jan 16, 2021·Animals : an Open Access Journal From MDPI·Irina Garcia-IspiertoMònica Llobera-Balcells
May 27, 2021·Reproduction in Domestic Animals = Zuchthygiene·Irina Garcia-IspiertoFernando López-Gatius
Sep 27, 2013·Journal of Ovarian Research·Mourad AssidiMarc-André Sirard

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