Table 2.

Infertility-related factors in the recurrent and single spontaneous miscarriage groups

Items	Recurrent spontaneous miscarriage (n = 200)	Single spontaneous miscarriage (n = 551)	P
Ovulation disorder	38 (19.0)	138 (25.1)	0.085
Uterine factors	26 (13.0)	35 (6.4)	0.004*
Cervical factors	3 (1.5)	5 (0.9)	0.489
Fallopian tube factors	104 (52.0)	294 (53.4)	0.742
Pelvic cavity factors	15 (7.5)	67 (12.2)	0.073
Endocrine disorder	11 (5.5)	12 (2.2)	0.024*
Immune disorder	20 (10.0)	18 (3.3)	<0.001*
Reproductive tract infection	2 (1.0)	4 (0.7)	0.710
Chromosomal abnormalities	8 (4.0)	0	0.979
Male infertility	20 (10.0)	85 (15.4)	0.070
Unknown etiology	7 (3.5)	12 (2.2)	0.310

Data are presented as n (%). P values were estimated by univariate logistic regression. *Statistical significance.