They are used in mapping sequences of longer stretches of DNA. (newscientist.com)
No doubt, this process will feel much more difficult than just feeding the baby, but it is worth the effort as the ultimate goal is her sleeping for longer stretches of time. (sohoparenting.com)
Nobody knows when a child is capable for sleeping long stretches of time without milk apart from the child itself. (sarahockwell-smith.com)