Obstetric and fetal complications
Table 2 shows the most frequently reported obstetric and fetal complications. Placental abruption was reported in three studies, respectively Flemming et al., Murthy et al. and Rasheed et al. The incidence of placental abruption was reported to be respectively 1, 6 and 10% in these studies. The incidence of congenital malformations was reported in the study of Hagström et al. and Salman et al. to be respectively 2 and 3%.