To learn more, scientists artificially bred 13 generations of wild fruit flies to produce flies that were either long sleepers (sleeping 18 hours each day) or short sleepers (sleeping 3 hours each day). (sciencedaily.com)
It is also vital to connect with other breastfeeding mothers and become familiar with the behavior of a normal breastfed baby; mothers who make plenty of milk worry that their babies aren't getting enough when they're fussy, if they feed often, or aren't long sleepers. (kellymom.com)
When the scientists find short or long sleepers through the survey, they ask them to provide blood samples along with others from their family members for further genetic tests. (asahi.com)