Table 5.
Previous studies of pregnancy outcomes among women infected with 2009/H1N1
| Study | Study period (2009) | Study population | No of pregnant women reported | No (%) women with outcome data | Pregnancy outcome | No (%) affected |
|---|---|---|---|---|---|---|
| Siston 20105 | 14 April to 21 August | Pregnant women with 2009/H1N1 influenza, USA | 788* | 169 (21) | Preterm delivery | 51 (30) |
| 200 (25) | Spontaneous abortion | 8 (4) | ||||
| Louie 20103 | 23 April to 11 August | Women with confirmed 2009/H1N1 needing intensive care, California, USA | 18 | 12 (67) | Preterm delivery | 10 (83) |
| Women admitted to hospital (>24 hrs) or died with confirmed 2009/H1N1, California, USA | 94 | 37 (39) | Spontaneous abortion | 2 (5) | ||
| Creanga 20106 | 01 May to 30 June† | Women admitted to hospital with H1N1v infection, New York, USA | 62 | 40 (65) | Preterm delivery | 6 (15) |
| Neonatal death | 2 (5) | |||||
| Hewagama 201022 | 20 May to 31 July | Pregnant women admitted to hospital with 2009/H1N1 infection, Victoria, Australia | 43 | 15 (35) | Preterm delivery | 6 (40) |
| 24 (56) | Stillbirth‡/neonatal death | 3 (13) | ||||
| ANZIC 20104 | 01 June to 31 August | Pregnant or recently postpartum women admitted to intensive care unit with 2009/H1N1, Australia and New Zealand | 64 | 61 (95) | Miscarriage§ | 2 (3) |
| Stillbirth‡ | 4 (7) | |||||
| Preterm delivery | 22 (37) | |||||
| Low birth weight | 18 (31) | |||||
| Dubar 201023 | 01 August to 31 December¶ | Pregnant women admitted to hospital with confirmed 2009/H1N1, France | 314 | 146 (46) | Stillbirth | 2 (1) |
| Loss of pregnancy before 24 weeks | 4 (2) | |||||
| Low birth weight | 22 (16) | |||||
| Preterm birth | 26 (19) |
*Including 509 women admitted to hospital.
†Followed up until 18 September 2009.
‡Defined as in utero death ≥20 weeks’ gestation.
§Defined as in utero death <20 weeks’ gestation.
¶Followed up until 30 April 2010.