Repeated sperm injection under the zona following initial fertilization failure.

@article{Wiker1993RepeatedSI,
  title={Repeated sperm injection under the zona following initial fertilization failure.},
  author={Sharon R. Wiker and Michael J. Tucker and Graham L Wright and Henry E. Malter and Hilton Isadore Kort and Joe B. Massey},
  journal={Human reproduction},
  year={1993},
  volume={8 3},
  pages={467-9}
}
When fertilization fails following micromanipulative under-zona insemination, it is possible to repeat the procedure adding more spermatozoa to achieve fertilization, embryonic development and pregnancy. We report on 18 human in-vitro fertilization cycles where this approach was used. In nine cycles only late-fertilized embryos were available for transfer… CONTINUE READING