A new mother stands in her kitchen at 2 p.m., phone in hand, frantically calculating whether her baby has been awake for exactly 90 minutes or if she's already missed the narrow window for an easy nap ...

A new mother stands in her kitchen at 2 p.m., phone in hand, frantically calculating whether her baby has been awake for exactly 90 minutes or if she’s already missed the narrow window for an easy nap ...

A heated online discussion has emerged after new parents began questioning whether the rigid adherence to wake windows-prescribed periods when babies should be awake before sleeping-is truly necessary ...