Table 4.

Clinical pregnancy and live birth rates per case in patients in Group IVF.

	Age Group
	a (<35)	b (35–39)	c (≥40)
Clinical pregnancy rate	28.9% (39/136)**	13.3% (22/165)	2.4% (2/85)
Live birth rate	22.0% (30/136)**	9.7% (16/165)	1.2% (1/85)

Group IVF, patients in whom ovarian stimulation and IVF-ET were attempted.

a, patients <35 years; b, patients 35–39 years; c, patients ≥40 years of age at initiation of follow-up.

Patients who wished to cryopreserve oocytes (n=24) and patients who had cryopreserved embryos but had not undergone embryo transfer (n=13) were excluded.

**p < 0.01.