Sleep: getting 6 to 8 hours per night, as close to the natural circadian rythyms of the sun as possible, is almost a must for your body to function correctly. (naturalchoiceswellness.com)
This will allow your body to make D3 which will result in many improvements, not the least of which is to help reset your circadian rythyms so you can sleep. (thyroidpharmacist.com)
Even if she didn't wake up, you can disrupt sleep rythyms so that certain critical sleep patterns don't happen. (babywisemom.com)