MELBOURNE, Australia --
A new study suggests that gender differences in levels of wakefulness are not the reason why more boys die of sudden infant death syndrome. Boys are more commonly the victims of SIDS
, but researchers in Australia found that infant boys are more easily woken up than girls at 2 to 4 weeks old.
Researchers said the differences in sleep arousal between male and female infants were resolved by the age of 2 to 3 months, which is the most vulnerable age for SIDS.
Researchers said that more parents may try to put restless male infants to sleep on their stomachs which increases the rate of SIDS.