Table 1

Causes of death among live births whose co-twin was a fetal or infant death

Gestational age (weeks)BW of fetal death* (g)Registered cause of fetal death*BW of live birth (g)Cause of death in liveborn twinAge at deathSex of the pair/chorionicity
*Refers to infant death in infant death plus infant survivor group.
BW, Birth weight; TTT, twin-twin transfusion; TRAP, twin reversed arterial perfusion; MM, male-male; FF, female-female, ULS, unlike sex; MC, monochorionic; DC, dichorionic; HMD, hyaline membrane disease; IVH, intraventricular haemorrhage; IUGR, intrauterine growth retardation.
Causes of death in the liveborn twin of a co-twin fetal death
    28595TTT syndrome1235TTT syndrome; pulmonary immaturity; IVH7 daysMM/MC
    291600TTT syndrome1140TTT syndrome18 daysMM/MC
    29UnknownFetus papyraceous1500, maleRenal agenesis1 hourunknown
    30990TTT syndrome1179TTT syndrome; extensive white matter infarction32 daysFF/MC
    312795Acardia; anencephaly; multiple anomalies1470TRAP sequence1 dayMM/MC
    321475TTT syndrome1635TTT syndrome14 daysMM/MC
    342620TTT syndrome1670TTT syndrome14 hoursFF/MC
    36477Acardia; anencephaly2000Congenital cardiac anomaly40 daysFF/MC
    38UnknownFetus papyraceous2190TTT syndrome; microcephaly; cerebral palsy102 daysFF/MC
    391280IUGR, macerated fetus1180Respiratory obstruction; epileptic fit; cerebral palsy11 yearsFF/unknown
    402780Antepartum anoxia4000Intrapartum anoxia7 daysMM/MC
    402360Antepartum anoxia3360Intrapartum anoxia5 minutesULS/DC
Causes of death in childhood in infant survivors whose co-twin was an infant death
    26790HMD, IVH690Cardiac arrest; bronchopneumonia; bronchopulmonary dysplasia13 monthsFF/unknown
    382090Coarctation of aorta2295Respiratory arrest; sleep apnoea; cerebral palsy7 yearsMM/unknown
    362010Miscellaneous (inborn error)2110Niemann-Pick disease13 yearsMM/unknown