E S Hafez

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Female rats raised from birth under a light/dark (LD) or constant light (LL) regimen were given injections at either 24, 29, 33 or 35 days of age of either 5 IU PMSG or 0.1 ml saline. Two days following PMSG or saline injection, the rats were given injections of either 1,000 ng synthetic gonadotropin releasing hormone (GnRH) or 0.1 ml saline. Blood samples(More)
The surface of ovarian oocytes is evenly covered with finger-like microvilli about 1 micron long. Penetration of capcitated spermatozoa in the zona pellucida apparently occurs after acrosome reaction and though a narrow slitmmorulae are constituted of rounded blastomeres, usually of similar size and microvillous covering. A few blastomeres may be smaller(More)
Ejaculated baboon sperm was observed by scanning electron microscopy. The plasma membrane was generally smooth except on the acrosome where it was probably slightly wrinkled. The head was short, oval, paddle-shaped and tapering at its anterior end. The anterior segment of the acrosome was surrounded by a marginal thickening; the postacrosomal region was(More)
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