Characteristics of ovarian follicle development in domestic animals
Characteristics of ovarian follicle development in domestic animals
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DOI：
10.1046/j.1439-0531.2003.00439.x
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发表时间：
2003-08-01
影响因子：
1.7
通讯作者：
Evans, ACO
中科院分区：
文献类型：
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作者：
Evans, ACO
在大多数家畜中，卵泡发育的后期在发情周期(牛、绵羊、山羊、马和水牛)或生殖活动时期(骆驼和骆驼)以波浪型模式发生。卵泡波是一群依赖促性腺激素的卵泡的有组织的发育，这些卵泡最初都会增大，但其中大多数后来会因闭锁(从属卵泡)而退化并死亡。剩余(优势)卵泡的数量是特定物种特有的，并指示产仔大小。卵泡波在黄体期和卵泡期都有发育，排卵的是最后一个卵泡波的主导卵泡(S)。然而，在某些情况下，最后两个卵泡波中的优势卵泡可以排卵(绵羊和山羊)。有组织的波浪状的卵泡生长模式是例外的，在这种模式下，卵泡的发育显然是连续的(猪和鸡)。在这些动物中，许多卵泡发育到中等直径，在特定的时间，注定要排卵的卵泡被从这个池中挑选出来，并继续生长到排卵。了解不同物种的卵泡发育模式，对于设计改进的方法来控制家畜的繁殖越来越重要。
In most domestic animals the later stages of follicle development occurs in a wave-like pattern during oestrous cycles (cattle, sheep, goats, horses and buffalo) or periods of reproductive activity (llamas and camels). A follicle wave is the organized development of a cohort of gonadotrophin-dependent follicles all of which initially increase in size, but most of which subsequently regress and die by atresia (subordinate follicles). The number of remaining (dominant) follicles is specific to the species and is indicative of litter size. Follicle waves develop during both luteal and follicular phases and it is the dominant follicle(s) of the last follicular wave that ovulates. However, there are cases where dominant follicles from the last two follicle waves can ovulate (sheep and goats). There are exceptions to the organized wave-like pattern of follicle growth where follicle development is apparently continuous (pigs and chickens). In these animals many follicles develop to intermediate diameters and at specific times follicles that are destined to ovulate are selected from this pool and continue growing to ovulation. Understanding the pattern of follicle development in different species is increasingly important for designing improved methods to manipulate reproduction in domestic animals.