I was first told that my aorta is slightly dilated at 4.0 cm. There is some variation in the way the term aneurysm is used. For the thoracic aorta, most agree that at a diameter of 4.0 cm it has reached a size that is considered an aneurysm. The word dilated refers to the enlargement of the aorta.
Called also neonate and newborn. premature infant (preterm infant) one born before a gestational age of 37 completed weeks (259 days). The duration of gestation is measured from the first day of the last menstrual period and is expressed in completed days or weeks.
About 1 in 10 babies is born prematurely each year in the United States. The earlier in pregnancy a baby is born, the more likely he is to have health problems. Some premature babies have to spend time in a hospitalâs neonatal intensive care unit (also called NICU). This is the part of a hospital that takes care of sick newborns.