Prediction of Human Sperm Fertilizing Ability by the Hyperactivated Motility Patterns
نویسندگان
چکیده
منابع مشابه
Hyperactivated sperm motility driven by CatSper2 is required for fertilization.
Elevations of sperm Ca2+ seem to be responsible for an asymmetric form of motility called hyperactivation, which is first seen near the time of fertilization. The mechanism by which intracellular Ca2+ concentrations increase remains unknown despite considerable investigation. Although several prototypical voltage-gated calcium channels are present in spermatozoa, they are not essential for moti...
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Hyperactivacion of sperm entails increases in the flagellar wave amplitude and the asymmetry of flagellar movement. In simple media on glass slides, hyperactivated sperm are not highly progressive. Nevertheless, we have evidence that hyperactivated sperm within the oviduct possess greater ability to reach the oocyte plasmalemma than normal activated sperm. First, hyperactivated rabbit sperm, fl...
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Our objective was to study the incidence of sperm-tail phosphotyrosine immunoreactivity in normozoospermic and asthenozoospermic human sperm samples, its association with sperm motion parameters, particularly hyperactivated motility, and its potential involvement in the pathogenesis of asthenozoospermia. The work was conducted as a prospective experimental study in the Sperm Biology and Androlo...
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Cholesterol, being the starting point of steroid hormone synthesis, is a long known modulator of both female and male reproductive physiology especially at the level of the gonads and the impact cholesterol has on gametogenesis. Less is known about the effects cholesterol homeostasis may have on postgonadic reproductive functions. Lately, several data have been reported showing how imbalanced c...
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The aim of the study was to evaluate motility parameters of Lacaune (Lc) and east-Friesian (eF) ram frozen-thawed spermatozoa by cASA (computer-Automated Sperm Analysis) technique in relation to their in vivo fertilizing ability. Fresh ejaculates were diluted in a Triladyl extender containing 20 % egg yolk, 6 % glycerol and 0.1 % trehalose and frozen in a liquid nitrogen vapour. The evaluation ...
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ژورنال
عنوان ژورنال: Journal of Mammalian Ova Research
سال: 2003
ISSN: 1341-7738,1347-5878
DOI: 10.1274/jmor.20.29