Th3 first thing he should do is register with the putative father registry. Once that is done all he can do is wait for the birth of the child. Once the child is born he can file a paternity petition in family court and either a custody of visitation petition at the same time. He should speak with a local family law attoerney to help with the steps.
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He will have to wait until there is a live birth and then file a paternity and custody petition in Family Court. Until the child is born, he cannot compel her to stay in NY. Notably, if the child is due in May, and she leaves before that time, NY will still have jurisdiction. In the meantime, he should be very supportive with the pregnancy and offer assistance financially with the birth expenses. His efforst should be documented and he should consult a family law attorney once the child is born to assist him in this matter.
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