Table 6.

Association of abnormal placental development with the occurrence of perinatal complications in programmed cycles.

	abnormal placental development	without abnormal placental development	χ2	P
Variables	n=96	n=539
Gestational diabetes	24(25.0)	156(28.9)	0.624	0.430
Preeclampsia	11(11.5)	28(5.2)	5.546	0.019
Premature birth	11(11.5)	36(6.7)	2.716	0.099
Cesarean section	83(86.5)	366(67.9)	13.545	<0.001
Postpartum hemorrhage	34(35.4)	61(11.3)	37.199	<0.001
Low birth weight	6(6.3)	19(3.5)	1.600	0.206
High birth weight	7(7.3)	56(10.4)	0.875	0.350

Categorical data was expressed as the number of cases (as a percentage of the total).

P-value <0.05 was considered statistically significant.