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Fertilization experiments using zona-free hamster eggs and spermatozoa from both guinea pig and human were conducted in the presence of cytochalasin D to evaluate the possible role of actin filame...
In vitro bovine cervical mucus (BCM) penetration tests, sperm penetration assays (SPA) using zona-free hamster eggs, and routine semen analyses were performed on a total of 136 freshly collected sem...
The presence of white blood cells in semen has been associated with male infertility. Previous studies indicate that pyospermia occurs in conjunction with decreases in sperm motility, number of no...
This study compared the cryoprotective effect of glycerol with that of a zwitter ion buffer system (TESTCY). Spermatozoa that are cryopreserved in the presence of glycerol possess a somewhat highe...
Penetration of spermatozoa in bovine cervical mucus (BCM) from two groups of men was investigated and correlated with the different parameters of spermograms from these same subjects. Sperm penetr...
Sperm penetration rates in the heterologous ovum penetration test were correlated with results of routine semen analysis in 30 fertile and 50 infertile men. There was no difference in penetration ra...
Thirty-two men with abnormal (less than or equal to 11% penetration) Sperm Penetration (hamster ova) Assay (SPA) results were treated with doxycycline and reevaluated by SPA and seminal fluid analys...
Parameters influencing the zona-free hamster egg bioassay for human sperm fertility potential were evaluated. Egg recovery from hamsters superovulated at random with respect to their estrous cycle w...
The involvement of a trypsin-like enzyme and a phospholipase A2 in hamster sperm-egg fusion was investigated. Previously acrosome-reacted sperm and zona pellucida-free eggs were incubated in a low...
The scanning electron microscope was used to study the morphology of sperm entry into the zona-intact rat ova fertilized in vitro. It is the anteriormost tip of the sperm head, which first associate...
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...
Poor quality ejaculates appear associated with reduced zona penetration and poor fertilization in vitro in some felid species or populations. Even morphologically normal sperm from these teratospe...
A prospective study relating computer-assisted semen analysis (CASA) and technician-determined morphology to sperm penetration assay (SPA) outcome in patients with unexplained infertility or male fa...
The diagnostic significance of sperm penetration assays based on a commercially available hyaluronate preparation (Sperm Select) has been investigated in the male partners of 77 couples characteri...
The authors studied hyperactivated motility of human spermatozoa as a method of evaluating capacitation by examining its relationship to results of zona-free hamster oocyte sperm penetration assays ...

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