瓶鼻海豚发情同步后的卵泡和激素变化

Gisele A Montano, Pat Clough, Todd Schmitt, Michelle Davis, Justine K O'Brien, Karen Steinman, Todd Robeck
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引用次数: 0

摘要

为了进一步了解激素调节对卵泡发育的影响,在使用阿替诺孕酮同步发情后,对排卵和未排卵的雌性瓶鼻海豚(n = 15)进行了卵巢超声波检查和尿激素谱测定。在同步发情后,每天进行卵巢超声波检查,以描述卵泡发育与内分泌的关系。卵泡大小分为极小(VSM)、小(SM)、中(MD)和大(LG)。在排卵期女性中,确定了两个卵泡波,卵泡偏离建立优势卵泡的情况只发生在第二个卵泡波中。对于非排卵女性,只观察到第一波。在所有尿液激素中,未排卵组的促卵泡激素(uFSH)、黄体生成素(uLH)、雌酮共轭物(uE1-C)和雌三醇(uE3)浓度明显低于排卵组,但孕激素和皮质醇浓度与排卵组相似。随着排卵的临近,uE1-C和uE3的浓度以及MD和LG卵泡的数量显著增加(P < 0.05),而uFSH的浓度显著下降(P < 0.05)。随着LG卵泡数量的增加和SM卵泡数量的减少,尿LH也明显增加。卵泡发育的特征及其与激素评估的关系补充了我们对瓶鼻海豚同步化后卵泡募集的理解,并为排卵和非排卵雌性对发情同步化方案的反应差异提供了新的信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Follicular and Hormonal Changes after Estrous Synchronization in Bottlenose Dolphins.

Follicular and Hormonal Changes after Estrous Synchronization in Bottlenose Dolphins.

Follicular and Hormonal Changes after Estrous Synchronization in Bottlenose Dolphins.

Follicular and Hormonal Changes after Estrous Synchronization in Bottlenose Dolphins.

To gain more knowledge about the influence of hormone regulation on follicle development, ovarian ultrasounds were performed, and urinary hormone profiles were determined in ovulating and non-ovulating female bottlenose dolphins (n = 15) following estrus synchronization with altrenogest. Ovarian ultrasounds were conducted daily, post synchronization to describe follicular recruitment in relationship to the endocrine profile. Follicle sizes were grouped into very small (VSM), small (SM), medium (MD) and large (LG). In ovulating females, two follicular waves were identified, and follicular deviation towards establishing a dominant follicle only occurred during the second wave. For non-ovulating females, only the first wave was observed. For all urinary hormones, the non-ovulating group presented significantly lower concentrations of follicle stimulating hormone (uFSH), luteinizing hormone (uLH), estrone conjugates (uE1-C) and estriol (uE3) but similar progestagen and cortisol concentrations compared to the ovulating group. Concentrations of uE1-C and uE3 and numbers of MD and LG follicles significantly (P < 0.05) increased, while uFSH concentrations significantly (P < 0.05) decreased as ovulation approached. Urinary LH significantly increased concurrently with increasing numbers of LG follicles and decreasing numbers of SM follicles. The characterization of follicular development and its relationship with hormone assessments complements our understanding of follicular recruitment post-synchronization in bottlenose dolphins and provides new information concerning differences between ovulating and non-ovulating females in response to an estrous synchronization protocol.

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