A parent is a caregiver of the offspring in their own species. A biological parent is a person whose gamete resulted in a child, a male through the sperm, and a female through the ovum. A female can also become a parent through surrogacy. Some parents may be adoptive parents, who nurture and raise an offspring, but definition of parents pdf not actually biologically related to the child.
Orphans without adoptive parents can be raised by their grandparents or other family members. A parent can also be elaborated as an ancestor removed one generation. With recent medical advances, it is possible to have more than two biological parents.