Baseline and MRI characteristics of the study populationa
| Characteristics | |
|---|---|
| Maternal characteristics (n = 29; fetal MRI) | |
| Maternal age (yr) | 30.5 (27.8/35.3) |
| Maternal body mass index | 22.8 (20.8/23.9) |
| Maternal smoking | 3 (12%) |
| Placental weight (g) | 455 (375/510) |
| Patient characteristics (n = 61; total study population) | |
| Female | 18 (30) |
| CHD groups | |
| SVP | 21 (34) |
| TGA | 18 (30) |
| LVOTO | 22 (36) |
| Antenatal CHD diagnosis | 61 (100) |
| Twin | 1 (2) |
| Genetic disorder | 0 (0) |
| Additional congenital anomaly | 3 (5) |
| Gestational age (wk) | 39.1 (38.4/40.1) |
| Birth weight (g) | 3320 (2970/3670) |
| Birth weight (z score) | −0.4 (−0.8/0.3) |
| Cesarean delivery | 18 (31) |
| Neonatal death | 6 (10) |
| MRI characteristics | |
| Fetal, PMA (wks) | 33.4 (32.7/34.1) |
| Preoperative, days after birth | 5 (3/6) |
| Preoperative, PMA (wks) | 40.1 (39.1/41.0) |
| Postoperative, days after surgery | 8 (7/9) |
| Postoperative, PMA (wks) | 42.0 (40.6/43.0) |
Note:—LVOTO indicates left ventricle outflow tract obstruction; SVP, single ventricle physiology; TGA, transposition of the great arteries.
↵a Median and interquartile range or number with percentage are shown. No significant differences were seen between the primary and secondary study populations.