Age (years) (range)

39.47 ± 3.6 (29–46)

Number of conventional cycles before (range)

0.81 ± 0.97 (0–5)

Number of minimal/mild stimulation cycles started per patient including canceled cycles (range)

3.21 ± 1.94 (1–11)

Number of frozen embryos accumulated per patient

3.72 ± 2.29 (1–13)

Number of FET cycles per patient (range)

1.37 ± 0.67 (1–4)

AMH (ng/mL) (range)

0.99 ± 0.86 (0.07–4.0)

Number of day-3 stage embryos transferred per FET

1.7 ± 0.53

Number of day-5 stage embryos transferred per FET

1.6 ± 0.63

Days to pregnancy from the first minimal/mild stimulation cycle (range)

324 ± 176 (93–877)

Ongoing pregnancy rate per FET cycle

46.8% (72/154)

Ongoing twin pregnancy rate per FET cycle

8.4% (13/154)