Table 1.

Patient characteristics (n = 272)

	Anembryonic gestations	Missed abortions with fetal pole
	n = 82	n = 190
Mean age  ±  SD in years	36.7 ± 5.0	36.9 ± 4.2
Patients ≥ 35 years old	53 (63%)	137 (72%)
History of ≥ 1 live birth	14 (17%)	42 (22%)
History of ≥ 2 prior SAB	19 (23%)	33 (17%)
IVF conceptions	45 (55%)	106 (56%)
COH conception	17 (20%)	49 (25%)
Natural cycle conceptions	20 (24%)	49 (26%)
Number of cases with CRL > 1.0 cm		49 (26%)

SAB: spontaneous abortions, COH: controlled ovarian hyperstimulation with clomiphene citrate, letrozole or FSH/HMG.