Oocyte activation induced by spermatids and the spermatozoa
نویسندگان
چکیده
منابع مشابه
Fertilization of oocytes by injecting spermatozoa, spermatids and spermatocytes.
The feasibility of fertilization by injecting spermatozoa into oocytes has increased significantly the possibilities for treatment of severe male infertility. However, the rapidity of human application has raised some concern about potential health hazards for the progeny. Human pregnancies and births have also occurred with the use of immature spermatozoa and spermatids, and normal offspring h...
متن کاملSpectrin and ankyrin like proteins in spermatids and spermatozoa of the hamster and some other mammals.
The presence of spectrin and ankyrin-like proteins was investigated during the differentiation and maturation of spermatozoa in mammalian species which have previously been studied for actin and calmodulin. These actin-binding proteins were characterized by immunoblotting and localized by immunoelectron microscopy. Neither spectrin nor ankyrin could be detected in the F-actin rich subacrosomal ...
متن کاملThe activity (calcium oscillator?) responsible for human oocyte activation after injection with round spermatids is associated with spermatid nuclei.
OBJECTIVE To compare the oocyte-activating ability of whole human round spermatids and their isolated nuclei. DESIGN Prospective study using sibling oocytes from patients undergoing spermatid conception and intracytoplasmic sperm injection treatment cycles. SETTING Private assisted reproduction laboratories and a university department. PATIENT(S) Couples with male infertility. INTERVENT...
متن کاملSearch and identification of spermatozoa and spermatids in the ejaculate of non-obstructive azoospermic patients.
OBJECTIVE To search and to identify spermatozoa and spermatids, present in the ejaculate of non-obstructive azoospermic patients. MATERIALS AND METHODS 27 patients, aged between 18 and 48 years, with initial diagnosis compatible with non-obstructive azoospermia, underwent up to 3 seminal samples, with assessment of macroscopic and microscopic parameters differentiated for each sample. In the ...
متن کاملDifferentiation Between the Effect of Protamine Deficiency and Failed Oocyte Activation on Fertilization Post ICSI
Sperm premature chromosomal condensaion (PCC) and failed oocyte activation are considered to result in failed fertilization post intracytoplasmic sperm injection (ICSI). Recent studies also suggested that sperm protamine deficiency may induce PCC. The ain of this study was to assess the effect of failed oocyte activation and protamine deficiency on failed ferilization post ICSI and to indicate ...
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ژورنال
عنوان ژورنال: International Journal of Andrology
سال: 2000
ISSN: 0105-6263,1365-2605
DOI: 10.1046/j.1365-2605.2000.00019.x