Antoine Dodson's Baby -- He's A Father Now ... Run & Tell THAT, Homeboy!

Hide ya placenta ... formerly gay and formerly famous YouTube star Antoine Dodson is presently a father ... his baby mama just gave birth to their son.

Dodson posted a pair of photos on Twitter announcing the arrival, writing ... "He's here, I'm officially a dad, 6lbs 7oz 19in long!!"

Antoine's come a looooong way since 2010 when he famously helped his sister fend off an attempted rapist ... and told a reporter, "Hide ya kids, hide ya wife, hide ya husbands ... cause they rapin' everybody out here."

Last year, he surprisingly announced ... "I want a wife and family, I want to multiply and raise and love my family that I create."