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.
Generally, in order to have your child custody issues decided by a judge in Minnesota, the child must have lived in Minnesota with a parent or a person acting as a parent for at least six (6) consecutive months (180 days) before starting the court process. There are exceptions for emergency situations.