Table III.

Relationship between menstrual cycle pattern, live birth and the parameters that were predictors of live birth in the multivariate logistic regression model.

Parameter	All patients n = 335	Menstrual cycle pattern			P-valuea
		Oligomenorrhea (n = 180) (54%)	Amenorrhea (n = 61) (18%)	Anovulatory cycles of 21–35 days (n = 94) (28%)
Live birth	17.3%	22.2%	16.4%	8.5%	0.022
Duration of infertility (years)	2.9 ± 1.8	2.7 ± 1.6	3.1 ± 2.8	3.0 ± 1.4	0.390
FSH (IU/l)	5.3 ± 2.2	5.2 ± 1.9	4.6 ± 1.8b	5.9 ± 2.7c,d	0.001

^aThe relationship between menstrual cycle pattern and live birth was evaluated by logistic regression. The relationships between menstrual cycle pattern and duration of infertility and FSH were evaluated by one-way ANOVA, and individual groups were compared with Student's t-test.

^bP < 0.07 versus oligomenorrhea.

^cP < 0.01 versus oligomenorrhea.

^dP < 0.001 versus amenorrhea.