The endometrium is the innermost layer of the uterus that contains the lining which is responsible for accepting and nourishing a fetus during the pregnancy process. The lining of this cavity changes with every monthly cycle in response to the primary female hormones produced by the ovaries: estrogen and progesterone.
If one parent is more stable than the other, judges can decide to award primary custody to that parent. As a result, parental fitness is often a mechanism used in custody battles. Each state has its own set of rules regarding what makes a parent unfit.
A parent will be deemed unfit if his or her child is abused. A parent may be deemed unfit if he or she is unable to provide food and clothing for a child. Substance abuse may result in a parent being labeled as an unfit parent. Mental instability may cause a parent to be labeled as unfit to care for children.