The ____ growth trend means “center-out.”

Low folic acid during pregnancy can result in _____.

During the embryonic period, the neural tube will become the _____.

The ability to move and control some parts of the body is referred to as “_____.”

Between _________ weeks , sex organs develop and are soon visible via ultrasound.

Most babies learn to grasp and hold onto objects by about _____ months old.

In the first half of the twentieth century, which two opposing theories dominated the discipline of psychology?

The areas at the very front of the cortex _____.

Most developmental psychologists believe that development is the result of _____.

The age of viability occurs at about ____ weeks after conception.