相关实验视频

Updated: Jun 4, 2025

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

Published on: July 8, 2020

哺乳乳奶牛的繁殖结果接受了第一次定时人工授精协议,使用不同的策略来诱导最终的排卵

Carlos E C Consentini¹, Leonardo F Melo², Jessica C Lemos Motta³

¹Department of Animal Science, University of São Paulo, Piracicaba, SP, Brazil, 13418-900; Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI 53706; GlobalGen Vet Science, Jaboticabal, SP, Brazil, 14887-360.

Journal of dairy science

|December 18, 2024

概括

雌激素酸 (EC) 和GnRH在奶牛中诱导排卵的策略导致了相似的AI比率的怀孕. 然而,EC的使用与减少妊娠流产有关,特别是当奶牛表现出雌激素时.

科学领域:

在牲畜中生殖内分泌学.
人工授精协议的人工授精协议
乳牛养殖管理乳牛养殖管理

背景情况:

定时人工授精 (TAI) 协议对于奶牛的生殖效率至关重要.
优化排卵诱导策略是最大限度地提高每人工智能 (P/AI) 怀孕的关键.
新的预同步策略旨在提高TAI协议的有效性.

研究的目的:

在一个新的定时AI协议结束时评估不同的排卵诱导策略.
为了比较雌二酸 (EC) 和GnRH对排卵和怀孕结果的影响.
评估雌性表达和黄体存在对生育能力的影响.

主要方法:

总共有909头哺乳乳奶牛接受了预同步协议,随后进行了TAI协议.
实验组接受了不同的排卵诱导治疗:EC,GnRH或两者 (EC/G).
监测了每个AI的怀孕 (P/AI),怀孕流产和雌激素表达.

主要成果:

在EC,GNRH和EC/G治疗组 (40.4%) 中没有观察到P/AI的显著差异.
与单独使用GNRH (19.8%) 相比,用EC (12.2%) 或EC/G (10.1%) 治疗的奶牛的妊娠损失较低.
在EC和EC/G组中,雌激素表达对P/AI产生了积极影响,但在仅用GNRH的组中没有.

结论:

使用EC和GnRH的排卵诱导策略产生类似的P/AI率,但EC可能会减少妊娠损失.
雌激素表达在生育结果中起着重要作用,特别是在使用EC时.
需要进一步的研究来证实EC施用与减少妊娠损失之间的关系.

关键词:

奶牛牛奶牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛的表达是的表达.生育能力生育能力生育能力生育能力排卵的同步排卵的同步.时间定制的AI.

更多相关视频

Author Spotlight: Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination

Author Spotlight: Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination

Published on: July 7, 2023

Milk Collection Methods for Mice and Reeves' Muntjac Deer

Milk Collection Methods for Mice and Reeves' Muntjac Deer

Published on: July 19, 2014

相关概念视频

Ovarian Cycle

Ovarian Cycle

The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle...

In Vitro Fertilization

In Vitro Fertilization

In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...