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Sperm binding to intact zona of unfertilised and fertilised human oocytes
| Experiment | Unfertilised oocytes | Fertilised oocytes |
| 1 | 14.5 ± 3.3 (12)a | 15.5 ± 3.7 (10) |
| 2 | 20.6 ± 6.0 (10) | 8.4 ± 1.5* (21) |
| 3 | 46.8 ± 9.1 (9) | 29.7 ± 5.0* (12) |
Results are expressed as the number of spermatozoa bound per oocyte (mean ± SEM); ()a number of oocytes ; * significantly different from unfertilised oocytes (Mann and Whitney test; p < 0.05)
