Table 3. Previous studies of pregnancy outcomes among women infected with the 2009 H1N1.
| Study | No. of pregnant women reported | No. and (%) actually infected' | Pregnancy outcome | No. affected | Maternal deaths | Antiviral treatment |
| LOUIE, 2010 (USA) [26] | 94 | 32 (34) | Miscarriage | 02 | 06 | 81% |
| ANZIC, 2010 (AUS/NZ) [29] | 64 | 61 (95) | Miscarriage | 02 | 06 | 81% |
| Stillbirth | 04 | |||||
| Premature delivery | 22 | |||||
| Low birth weight | 18 | |||||
| HEWAGAMA, 2010 (AUS) [28] | 43 | 15 (35) | Premature delivery | 06 | 01 | 77% |
| 24 (56) | Stillbirth/neonatal death | 03 | ||||
| SISTON, 2010 (USA) [25] | 788 | 169 (21) | Premature delivery | 51 | 30 | 84% |
| 200 (25) | Miscarriage | 08 | ||||
| CREANGA, 2010 (USA) [27] | 62 | 40 (65) | Premature delivery | 06 | 02 | 50% |
| Neonatal death | 02 | |||||
| DUBAR, 2010 (FRA) [14] | 314 | 146 (46) | Stillbirth | 02 | 03 | 95% |
| Loss of pregnancy (<24weeks) | 04 | |||||
| Premature delivery | 26 | |||||
| Low birth weight | 22 | |||||
| GÉRARDIN, 2010 (FRA) [13] | 271 | 139 (51) | Premature delivery | 17 | - | 86% |
| Congenital anomalies | 01 | |||||
| PIERCE, 2011 (UK) [15] | 272 | 256 (94) | Stillbirth | 07 | - | - |
| Loss of pregnancy (<24weeks) | 05 | |||||
| Premature delivery | 58 | |||||
| Congenital anomalies | 08 | |||||
| PRESENT STUDY, 2012 (BRA) | 589 | 243 (41) | Stillbirth | 08 | 24 | 56% |
| Loss of pregnancy (<24weeks) | 03 | |||||
| Congenital anomalies | 01 |