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.
If you are the only parent with physical custody of your child, it is kidnapping for the other parent to take your child outside of his visiting hours without your permission. Call the police. The police can file criminal charges. The police can also activate the Amber Alert system, to help find missing children.