It's not often people turn down a chance to knock up a supermodel ... but NFL star Julian Edelman told Adriana Lima he's not ready for more kids and that was one of the main reasons they split.
Multiple sources connected to both sides tell us ... the couple broke things off a few weeks ago after months of casual dating.
Distance was definitely a factor -- Lima lives in Miami, Julian lives in Boston and has a daughter in L.A.
But we're also told both stars are on completely different pages when it comes to family planning -- Adriana wants more kids.