A retrospective cross-sectional study: fresh cycle endometrial thickness is a sensitive predictor of inadequate endometrial thickness in frozen embryo transfer cycles

Table 1 Univariate analysis of variables associated with endometrial thickness in FET cycles

	ECT^a<8 mm; n=68	ECT ≥8 mm; n=206	p-value
*Age (years)*	33.44±4.16	33.93±3.85	0.4
*BMI* ^b *(kg/m* ² )	22.7±3.51	25.62±5.54	<0.0001
*History of previous pregnancy (%)*	70.6	87.4	0.001
*History of operative hysteroscopy (%)*	7.4	1.9	0.04
*Duration of estrogen supplementation (days)*	14.9±3	15.1±2.8	0.17
*Fresh cycle ECT (mm)*	10.05±1.89	12.93±3.12	<0.001

a – endometrial cavity thickness; b – body mass index; (χ2 for dichotomous variables, Student’s t-test for continuous variables)

ISSN: 1477-7827