Table 1.

Demographics of exome cohort

Demographic	Value (N=127)
Median maternal age (IQR)	32 years(29-35)
Nulliparous	45% (57/127)
Median gestational age at diagnosis of NIHF (range)	20.0 weeks (13.4-24.6)
Any concurrent anomaly	50% (64/127)
Maternal race/ethnicity
White	58% (74/127)
Asian	15% (19/127)
Multiracial	14% (18/127)
Hispanic or Latina	9% (12/127)
Black	2% (3/127)
Unknown	1% (1/127)
Type of abnormal fetal effusion
Early onset (increased NT or cystic hygroma)	23% (29/127)
Single abnormal fetal effusion	17% (21/127)
Traditionally defined NIHF with ≥2 abnormal effusions	61% (77/127)