_________ is self-propulsion. ​

_________ refers to the formation of parent-infant attachment. ​

A(n) _____ is a procedure for using ultrasonic sound waves to create a picture of an embryo or fetus.

In the structure of deoxyribonucleic acid (DNA), which of the following bases combines with thymine?

Autistic children may show _________ , a refusal to speak. ​

Most infants can walk by themselves by the age of _________ . ​

During the first stage of childbirth, the process of transition occurs. Transition lasts for _____.

During childbirth, with a(n) _____ and a spinal block, anesthesia is injected into the spinal canal or spinal cord, temporarily numbing the body below the waist.

The _________ principle relates to the fact that growth in infants proceeds from the trunk outward, from the body’s central axis toward the periphery. ​

_____ would be most effective in preventing the circulatory systems of a mother and baby from mixing during childbirth.