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.
A premature baby is one born before 37 weeks of gestation time. If a woman goes into labor before 37 weeks, it is referred to as preterm labor.In a typical pregnancy, delivery between 37 and 42 weeks is considered a full term, and anything after 42 weeks gestation is a post-term pregnancy.f a woman goes into labor before 37 weeks, it is referred to as preterm labor. In a typical pregnancy, delivery between 37 and 42 weeks is considered a full term, and anything after 42 weeks gestation is a post-term pregnancy.