What is parenting
it refers to the intricacies of raising a child, there can be more than one child. the child also doesn't have to biological to be a parent. 
From what age can someone cease to be a child
Ages of consent in the United States
In the United States, age of consent laws regarding sexual activity are made at the state level. There are several federal statutes related to protecting minors from sexual predators, but laws regarding specific age requirements for sexual consent are left to individual states, District of Columbia, and territories. Depending on the jurisdiction, the legal age of consent ranges from age 16 to age 18. In some places, civil and criminal laws within the same state conflict with each other.
History.
Parenting
Parenting or child rearing is the process of promoting and supporting the physical, emotional, social, and intellectual development of a child from infancy to adulthood. Parenting refers to the intricacies of raising a child and not exclusively for a biological relationship.
The most common caretaker in parenting is the father or mother, or both, biological parent(s) of the child in question, although a surrogate may be an older sibling, a grandparent, a legal guardian, aunt, uncle or other family member, or a family