Heart rate variability, or HRV, is a metric often computed by a biofeedback machine to determine the regularity of a heartbeat. It compares the time between each beat, to determine how steady your heart performs.
1 When your baby is getting sleepy, put your baby in his or her crib in a quiet, darkened room. 2  This will help your baby learn to go to sleep in his or her crib. 3  Don't rock your baby to sleep after about age 4 to 6 months. 4  Rock your baby, but lay the baby down to sleep while he or she is drowsy but still awake. Give your baby a bath, sing lullabies, read a book, or tell a story. 2  These activities can help your baby relax. 3  They also signal that it is time to sleep. 4  Don't get your baby excited with active play right before sleep. 5  When your baby is getting sleepy, put your baby in his or her crib in a quiet, darkened room.
Caring for your newborn brings great joy and excitement, but with it also comes sleep deprivation. Itâs a fact: Newborns simply canât sleep through the night -- so neither can you. The good news is that by 3 to 6 months babies typically develop regular sleep patterns and can slumber until dawn.aring for your newborn brings great joy and excitement, but with it also comes sleep deprivation. Itâs a fact: Newborns simply canât sleep through the night -- so neither can you. The good news is that by 3 to 6 months babies typically develop regular sleep patterns and can slumber until dawn.