O30 Multiple gestation

O31 Complications specific to multiple gestation

O32 Maternal care for known or suspected malpresentation of fetus

O33 Maternal care for known or suspected disproportion

O34 Maternal care for known or suspected abnormality of pelvic organs

O35 Maternal care for known or suspected fetal abnormality and damage

O36 Maternal care for other known or suspected fetal problems

O40 Polyhydramnios

O41 Other disorders of amniotic fluid and membranes

O42 Premature rupture of membranes

O43 Placental disorders

O44 Placenta praevia

O45 Premature separation of placenta [ abruptio placentae ]

O46 Antepartum haemorrhage, not elsewhere classified

O47 False labour

O48 Prolonged pregnancy