| Autor: |
Wiker, S R, Tucker, M J, Wright, G, Malter, H E, Kort, H I, Massey, J B |
| Zdroj: |
Human Reproduction; March 1993, Vol. 8 Issue: 3 p467-469, 3p |
| Abstrakt: |
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, and these gave rise to two viable pregnancies (22.2% per transfer). In six cycles, where a mixture of late- and timely fertilized embryos were available for transfer, two viable pregnancies arose (33.3% per transfer). In three cycles no fertilization was achieved even after reinsemination by repeated under-zona insemination. |
| Databáze: |
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