Table 1.
Characteristics of cases with parvovirus B19 infection and intrauterine transfusion (IUT)
| Total number of fetusus | 103 |
| Number of IUTs (total, n = 186) | |
| 1 | 46 (44.7%) |
| 2 | 39 (37.9%) |
| 3 | 12 (11.6%) |
| 4 | 5 (4.8%) |
| 5 | 0 |
| 6 | 1 (1%) |
| Route of transfusion | |
| Intravascular | 167 (89.8%) |
| Intraperitoneal | 13 (7.0%) |
| Intracardiac | 6 (3.2%) |
| Weeks of gestation at first IUT (median) | 19+3 (13+0- 31+4) |
| IUTs < 20 + 0 weeks | 100 (53.8%) |
| IUTs ≥ 20 + 0 weeks | 86 (46.2%) |
| Mean interval between 1st and 2nd IUT, days | 6.6 |
| Mean interval between 2nd and 3rd IUT, days | 13.1 |
| Mean interval between 1st and last IUT, days | 12.3 |
| Hydrops | 44 (42.7%) |
| Placental site | |
| Anterior wall | 57 (55.3%) |
| Posterior wall | 46 (44.7%) |
| Fetal Death | 16/103 (15.5%) |
| Overall Survival | 87/103 (84.5%) |
| Fetal Loss Rate at 1st IUT | 12/103 (11.7%) |
| Fetal Loss Rate at follow-up IUTs | 4/57 (7.0%) |