Parlevliet J M
Vakgroep Bedrijfsdiergeneeskunde en Voortplanting, Faculteit der Diergeneeskunde, Utrecht.
Tijdschr Diergeneeskd. 1998 Mar 15;123(6):184-6.
The studies described in this thesis investigated the factors that can affect the fertility of stallions. The introduction describes the male gamete and the processes that occur during maturation of sperm and fertilization. Methods to evaluate the quality of sperm and ova are then discussed. Fertility can be expressed in various ways and is also affected by many factors such as the stallion, the mare and management factors. The fertility of stallions is usually assessed a good year after they have served mares, because then the number of foals is known. However, it would be preferable to be able to predict a stallion's fertility before he is put to stud. To this end, it was investigated whether there is a relationship between a number of sperm parameters and the percentage of non-return after the first cycle. The endocrine control of reproduction is briefly described because hormonal factors can also influence the reproductive potential of stallions. The venereal diseases that are important for regulations concerning the international trade in sperm are also described. The relevance of this diseases to reproduction deserves further investigation. The minimum requirement for a stud stallion is that the stallion should produce sperm of adequate quality and should be able to fertilize mares.
本论文中描述的研究调查了可能影响种公马生育力的因素。引言部分介绍了雄配子以及精子成熟和受精过程中发生的情况。接着讨论了评估精子和卵子质量的方法。生育力可以通过多种方式表达，并且还受到许多因素的影响，例如种公马、母马和管理因素。种公马的生育力通常在其配种母马一年后进行评估，因为那时幼驹的数量是已知的。然而，能够在种公马开始配种之前预测其生育力会更好。为此，研究了一些精子参数与第一个周期后不再发情的母马百分比之间是否存在关系。简要描述了生殖的内分泌控制，因为激素因素也会影响种公马的繁殖潜力。还描述了对精子国际贸易法规很重要的性病。这种疾病与繁殖的相关性值得进一步研究。种公马的最低要求是该种公马应产生质量合格的精子并且能够使母马受精。
