Table 7.

Clinical pregnancy and live birth rates in patients in Group IVF-1-a with different durations of amenorrhea at the initiation of follow-up.

	Duration of Amenorrhea (years)
	<4	4–7	8–11	≥12
Clinical pregnancy rate	49.0% (25/51)*	24.1% (7/29)	11.1% (2/18)	0.0% (0/10)
Live birth rate	37.3% (19/51)	17.2% (5/29)	11.1% (2/18)	0.0% (0/10)

Group IVF-1-a, patients without possible iatrogenic causes or chromosomal abnormalities in whom ovarian stimulation and IVF-ET were attempted abnormality and were <35 years of age at the initiation of follow-up.

*p < 0.05.