Which criterion would designate as abnormal a person who never talks to other people?

Your nephew is a toddler. During his last visit to the pediatrician, the doctor measured his head circumference and his head is not growing as quickly as his body. What should you tell your sister?

This is to be expected, as the body grows faster than the head during toddlerhood. She should find a good surgeon. The fontanels must have closed too soon. You suggest that your nephew must have microcephaly. You should remind her that she also has a very small head.

A type of premature birth that occurs before 37 weeks gestation is called a ________ birth

Fill in the blank with the appropriate word.