title: Serum hormone concentrations and ovarian follicular wave emergence in Jilin sika deer (Cervus nippon hortulorum) after synchronization of estrous cycles.
abstract: The study was conducted to investigate the serum hormone concentrations and follicular dynamics present after synchronous treatment (CIDR) in female Jilin sika deer (n = 15) of estrous cycles. Blood samples were collected to analyze the FSH, LH, estradiol and progesterone during the estrous cycles. Manual transrectal ultrasonography examination was conducted at least thrice weekly to monitor the follicular wave. Ultrasonography showed that follicle development occurred in waves, and most estrous cycles in Jilin sika deer consist of one, two, or three waves. The largest follicles of the interwaves of two- and three-wave cycles were different (P < 0.05). The mean interovulatory interval was 15.0 ± 4.6 d. There was a surge in circulating FSH in two- and three-wave cycles. The emergence of the largest follicle was related to the peak of serum concentration of estradiol. Serum progesterone concentrations were not different between one- and three-wave cycles (P < 0.05). We concluded that FSH and estradiol concentration may have an important role in controlling follicular development, that the estrous cycle in Jilin sika deer is characterized by one, two, or three waves of follicular development after synchronization.
authors.affiliation: Institute of Special Animal and Plant Science, CAAS, Juye Street No. 4899, Changchun 130112, Jilin, China.
authors.forename: X M
authors.initials: XM
authors.lastname: Chen
authors.affiliation: Institute of Special Animal and Plant Science, CAAS, Juye Street No. 4899, Changchun 130112, Jilin, China. Electronic address: weihaijun2005@sina.com.
authors.forename: H J
authors.initials: HJ
authors.lastname: Wei
authors.affiliation: Institute of Special Animal and Plant Science, CAAS, Juye Street No. 4899, Changchun 130112, Jilin, China.
authors.forename: Y F
authors.initials: YF
authors.lastname: Yang
authors.affiliation: Institute of Special Animal and Plant Science, CAAS, Juye Street No. 4899, Changchun 130112, Jilin, China.
authors.forename: H L
authors.initials: HL
authors.lastname: Xue
authors.affiliation: Institute of Special Animal and Plant Science, CAAS, Juye Street No. 4899, Changchun 130112, Jilin, China.
authors.forename: W G
authors.initials: WG
authors.lastname: Zhao
authors.affiliation: Institute of Special Animal and Plant Science, CAAS, Juye Street No. 4899, Changchun 130112, Jilin, China.
authors.forename: M
authors.initials: M
authors.lastname: Zhao
mesh_terms: D000818:Animals; D003670:Deer / Q000502:physiology*; D004958:Estradiol / Q000097:blood*; D030762:Estrous Cycle / Q000097:blood; D004973:Estrus Synchronization / Q000379:methods / Q000502:physiology; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood*; D007436:Intrauterine Devices, Medicated / Q000662:veterinary; D007986:Luteinizing Hormone / Q000097:blood*; D006080:Ovarian Follicle / Q000502:physiology*; D011374:Progesterone / Q000097:blood*; D012098:Reproduction / Q000502:physiology; D012621:Seasons
chemical_list: D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone
keywords: Deer; Follicle; Ovary; Reproduction