Elleve af de 15 dødsfald i atosibangruppen skete i graviditeter med en gestationsalder fra 20 til 24 uger; i denne undergruppe var fordelingen af patienter skæv (19 kvinder i atosibangruppen, 4 i placebogruppen).
Eleven out of the 15 deaths in the atosiban group occurred in pregnancies with a gestational age of 20 to 24 weeks, although in this subgroup patient distribution was unequal (19 women on atosiban, 4 on placebo).