[The effect of spermatozoon morphology on the fertilization rate and on disorders in early embryonic development]

The influence of teratozoospermia on the results of in vitro fertilization was analysed. Indices of normal sperm morphology, in cases of failed fertilization in vitro, significantly differ from those of successful fertilization. Fertilization rate in patients with less than 14.0% of normal sperm morphology was 41.9%. If the index of normal sperm morphology exceeded 14.0%, the rate of fertilization made up 62.2%. These data enable us to conclude that teratozoospermia may result in zygote development disorders and in the increased probability of embryo fragmentation.