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.
But, babies follow their own time-table. They come out only when they feel they are ready to do so. The minimum time period a baby spends inside its mother's womb is 38 weeks, but it can even prolong up to 42 weeks. Thus, a baby is delivered anytime between the 38th to 42nd week of pregnancy. Gynecologists often give a fixed date for the delivery, however, hardly 3-5% of women deliver exactly on their due dates.