However, in many cases those spermatozoa are incompetent to fertilise an egg, perhaps due to their morphological or biochemical abnormalities.
Increased oxidative deoxyribonucleic acid damage in the spermatozoa of infertile male patients.
When insemination began 10 min after cell fusion spermatozoa penetrated 62.5% of hybrids.
Denuded oocytes were matured in vitro, spontaneously or by progesterone treatment (1 ug/ml), and inseminated with homologous spermatozoa.
At fertilization, the spermatozoon membrane becomes dense, thicker with fewer processes, denser pseudopodia, and a more anterior nucleus (fig. 9).
The status of the acrosomes of bound spermatozoa was also examined under the high power of a phase-contrast microscope.
Production of term offspring by in vitro fertilization using old mouse spermatozoa.
We wanted to find out whether such treatment affects the ability of the egg to complete the meiosis and to transform nuclei of spermatozoa.
