Table 1.
Recommended limits on the numbers of embryos to transfer
| Prognosis | <35 | Age (yr) 35–37 | 38–40 | 41–42 |
|---|---|---|---|---|
| Clevage- stage embryos | ||||
| Favorablea | 1–2 | 2 | 3 | 5 |
| All others | 2 | 3 | 4 | 5 |
| Blastocyts | ||||
| Favorablea | 1 | 2 | 2 | 3 |
| All others | 2 | 2 | 3 | 3 |
aFavorable = first cycle of IVF, good embryo quality, excess embryos available for cryopreservation, or previous successful IVF cycle
Reprinted from Fertil Steril, 99/1, American Society of Reproductive Medicine. Practice Committe Opinion. Criteria for number of embryos to transfer: a committee opinion, 44–6, Copyright (13), with permission from Elsevier [27]