Each column generally represents a single variable; however, one variable may span several columns. At the most basic level, a codebook describes the layout of the data in the data file and describes what the data codes mean. Codebooks are used to document the values associated with the answer options for a given survey question. Each answer category is given a unique numeric value, and these unique numeric values are then used by ...
The fetal attitude describes the position of the parts of your baby's body. The normal fetal attitude is commonly called the fetal position. 1  The head is tucked down to the chest.  The arms and legs are drawn in towards the center of the chest.
Fetal movements are the kicks, rolls, and hiccups of your unborn baby. You may start to feel these movements when you are 20 weeks pregnant. The movements grow stronger and more frequent as your baby grows. Fetal movements show that your unborn baby is getting the oxygen and nutrients he needs before birth. Fewer fetal movements may signal a problem with your baby's health.