This is the mechanics of human procreation. Since the child gestates in and ushers from a woman's body, we all the more readily believe that women have children, not men. So it's not his. An Alternate View I humbly submit a non-mechanics view. Women don't have children any more than men do.
Couples have children.
A couple conceives, bears, and raises children, not any one person. And both love as much and unconditionally, however much expressed in male or female ways. It is their mutual extension, equality if ever it existed. Irrespective of how it was born. But this would require thinking holistically.