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Table 1 Recommended limits on the numbers of embryos to transfer

From: Elective single embryo transfer- the power of one

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

  1. aFavorable = first cycle of IVF, good embryo quality, excess embryos available for cryopreservation, or previous successful IVF cycle
  2. 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]