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.
Quick Answer. According to USLegal, the criteria that determines an unfit parent varies by state. In general, the parent in question is legally unable to retain parental rights due to abuse, negligence or an inability to accept the responsibility of a dependent minor (as in the case of mental instability). Continue Reading.