Developmental potential of human pronuclear zygotes in relation to their pronuclear orientation. For patients in Group 2, we developed composite PN scores, by patient, based on embryo disposition. The process of maturation is under the control of the maturation promoting factor MPF. Zero PN, or 0PN, show no signs of fertilization. Maturation arrest of human oocytes may occur at various stages of the cell cycle. Performing ICSI using an injection pipette with the smallest possible inner diameter and a long taper increases normal fertilization rate, decreases incidence of degeneration and tripronuclear zygotes, and enhances embryo development. Additionally, improper oolemma protein content or orientation may prevent gamete membrane fusion events.
Optimizing the technique of embryo transfer. Heterotopic pregnancies following in-vitro fertilization and embryo transfer. Filled bladder simplifies human embryo transfer. Obstet Gynecol ; 5: It results from the mutation of the galactose 1-phosphate uridyl transferase GALT , the enzyme that converts galactose to glucose.
Transferencia embrionaria: simplificando la complejidad
Clinical Endocrinology, , Fertil Steril ; 85 2: Uterine contractions at the time of embryo transfer alter pregnancy rates alter in vitro fertilization. Ann NY Acad Sci ;
Are oocytes that can only be fertilized via direct injection of sperm from normospermic patients really desirable? Ovarian stimulation has been shown to lead to imprinting defects in the mouse placenta Fortier et al. None of the integrins known to be present on the mouse egg or to be ADAM receptors are essential for sperm-egg binding and fusion. The effect of pregnant mare serum gonadotropin on mouse embryos fertilized in vivo or in vitro. Repeated oocyte maturation block. Cytogenetic study of human oocytes uncleaved after in-vitro fertilization.