The embryos formed from fertilizing oocytes with sperm with subnormal hypo- osmotic swelling tests with conventional insemination rather than intracytoplasmic sperm injection are very unlikely to implant. The toxic fa...The embryos formed from fertilizing oocytes with sperm with subnormal hypo- osmotic swelling tests with conventional insemination rather than intracytoplasmic sperm injection are very unlikely to implant. The toxic factor transferred to the zona pellucida by such sperm can be negated by pretreating the sperm with the protein digestive enzyme chymotrypsin, resulting in markedly improved implantation rates.展开更多
A prospective double-blind study was performed to determine if Western blot detection of P34H, a sperm protein of epididymal origin that is involved in the binding to the zona pellucida, is predictive of standard IVF ...A prospective double-blind study was performed to determine if Western blot detection of P34H, a sperm protein of epididymal origin that is involved in the binding to the zona pellucida, is predictive of standard IVF outcome. Our results demonstrate that the proportion of positive P34H cases that produced embryos in vitro clearly differs from caseswith undetectable levels of P34H (P < .001).展开更多
文摘The embryos formed from fertilizing oocytes with sperm with subnormal hypo- osmotic swelling tests with conventional insemination rather than intracytoplasmic sperm injection are very unlikely to implant. The toxic factor transferred to the zona pellucida by such sperm can be negated by pretreating the sperm with the protein digestive enzyme chymotrypsin, resulting in markedly improved implantation rates.
文摘A prospective double-blind study was performed to determine if Western blot detection of P34H, a sperm protein of epididymal origin that is involved in the binding to the zona pellucida, is predictive of standard IVF outcome. Our results demonstrate that the proportion of positive P34H cases that produced embryos in vitro clearly differs from caseswith undetectable levels of P34H (P < .001).