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Sex Ratio of blastocyst-stage embryos at days 5, 6 and 7 of culture
| Day of Culture | Male blastocyst stage embryos | Female blastocyst stage embryos | Total | Percent male | Percent female |
|---|---|---|---|---|---|
| 5 | 5 | 4 | 9 | 55.6a | 44.4a |
| 6 | 25 | 26 | 51 | 49.0a | 51.0a |
| 7 | 9 | 12 | 21 | 42.9a | 57.1a |
a,bCorresponds to significant differences in frequency as determined by chi square
