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Maternal demographics and transfer cycle characteristics
| Maternal race/ethnicity | White | Asian | Hispanic | African American | Multiple | Unknown | ||
| 44% | 37% | 11% | 3% | 4% | 2% | |||
| Transfer type | Fresh cleavage stage | Frozen cleavage stage | ||||||
| 274/357 (77%) | 83/357 (23%) | |||||||
| Number of embryos transferred | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Number of transfers (n = 357) | 41 (11%) | 126 (35%) | 103 (29%) | 52 (15%) | 28 (8%) | 4 (1%) | 2 (1%) | 1 (0.3%) |
