There are many variants on utilitarian theories, each with very different answers. Even aside from that though, it can really only be answered by knowing at least some definite information about the aggregated utility functions of every ethically relevant entity, including your potential children and others.
Utilitarianism is not in general a practical decision theory. It states what general form ethical actions should take, but is unhelpfully silent on what actual decisions meet those criteria.
There are many variants on utilitarian theories, each with very different answers. Even aside from that though, it can really only be answered by knowing at least some definite information about the aggregated utility functions of every ethically relevant entity, including your potential children and others.
Utilitarianism is not in general a practical decision theory. It states what general form ethical actions should take, but is unhelpfully silent on what actual decisions meet those criteria.