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Ultrastructural Observations on the Penetration of Human Sperm into the Zona Pellucida of the Human Egg In Vitro
ultrastructure zona pellucida human ova acrosome reaction
2009/2/19
Sperm penetration into the zona of 46 human eggs was examined by electron microscopy. Preovulatory oocytes were aspirated at laparoscopy and inseminated by methods which produced normal pregnancie...
Evidence for the role of heterotrimeric guanine nucleotide-binding regulatory proteins in the regulation of the mouse sperm adenylyl cyclase by the egg's zona pellucida
Pertussis toxin acrosome reaction mastoparan cyclic
2009/2/18
Sperm acrosomal exocytosis is the result of a complex set of signal transduction pathways activated physiologically by the egg's extracellular matrix, the zona pellucida. In the mouse, the zona pe...
Exposure of human, boar, or bull sperm to a synthetic peptide increases binding to an egg-membrane substrate
human boar bull sperm synthetic peptide increases egg-membrane substrate
2009/2/18
We evaluated the effects of in vitro exposure of sperm to synthetic FertPlus peptide, which represents a 60-amino acid sequence within rat prosaposin, using a microwell sperm-binding assay (SBA), ...
Effect of egg yolk medium on the acrosome reaction of human spermatozoa
human spermatozoa capacltation acrosome reaction egg yolk medium
2009/2/6
Preincubation of human spermatozoa in an egg yolk medium (TESTY) at 5 C, followed by washing at 37 C by centrifugation and resuspension in a standard medium (BWW), enhanced the percentage of spermat...
Accessory sperm as an indication of fertilizing ability of rabbit spermatozoa frozen in egg yolk-acetamide with detergent
Accessory sperm fertilizing ability of rabbit spermatozoa
2008/12/26
Many factors besides initial semen quality affect fertilization rates as sperm interact with the environment of the female reproductive tract. One of these factors is sperm transport, which can be eva...
A fragment of prosaposin（SGP-1）from rooster sperm promotes sperm-egg binding and improves fertility in chickens
prosaposin（SGP-1） rooster sperm sperm-egg chickens
2008/12/26
A protein isolated from the supernatant of cryopreserved rooster sperm was found to increase the capability of cryopreserved rooster sperm to bind in vitro to the perivitelline membrane of a chicken e...
Infertility is a growing problem among couples trying to conceive; in the past the female partner was singled out as the primary reason for being unable to bear a child. Research now reveals that ...
Correlation Between Semen Parameters and the Hamster Egg Penetration Test（HEPT）Among Fertile and Subfertile Men in Singapore
Semen analysis sperm sperm function assay sperm morphology normal motile count
2008/12/24
The objective of this retrospective study was to distinguish between fertile and subfertile men based on their semen parameters and hamster egg penetration test (HEPT) outcome. This study involved 1...