
%0 Journal Article
%A Gianaroli, L 
%A Magli, MC 
%A Ferraretti, AP 
%A Fortini, D 
%A Feliciani, E 
%A Fiorentino, A 
%T Biological factors affecting subzonal sperm microinjection results
%J Reproduction, Fertility and Development
%D 1994/02/01
%V 6
%N 1
%P 63-66
%K 
%R https://doi.org/10.1071/RD9940063
%U https://www.publish.csiro.au/paper/RD9940063 
%X One hundred and sixteen couples with severe male factor infertility underwent 139 subzonal sperm microinjection cycles. In total, 1343 oocytes were microinjected, resulting in a fertilization rate of 24%, followed by a cleavage rate of 65%. In 26% of the zygotes, fertilization was delayed and embryos derived from these zygotes demonstrated a poor capacity for further growth and implantation. In 102 of 139 cycles (73%) embryo transfer was performed, resulting in 9 pregnancies. This study followed the fate of injected oocytes and early embryo development to investigate biological factors that influence the results of subzonal injection. 
