On the basis of the understanding of the cellular mechanisms of thyroid hormone action on the heart and cardiovascular system, it is possible to explain the changes in cardiac output, cardiac contractility, blood pressure, vascular resistance, and rhythm disturbances that result from thyroid dysfunction.
Last updated: July 2015. Tummy time is essential from day one to help your baby grow strong â even if your baby fusses and cries when you put him on his belly. Experts find that babies who don't spend time face-down often have some delays in their development of motor skills.
This recommendation was the cornerstone of the 1994 Back to Sleep campaign, and at that time, it was fairly earth-shattering. Up until 1994, parents were urged to place their babies on their tummies to sleep, since it reduced the risk that baby would spit up and then choke during the night. But hereâs whatâs tricky: in our experience, some babies seem to prefer sleeping on their stomachs.