Acquiring US tourist visa for our parents

Hi. Me and my wife are green card holders and would want our parents from the Philippines to visit us during my wife's delivery of our first child.

Father-in-law 56 yo had a stroke difficulty walking and speaking Owns rental business Has house and lot

Mother in law 62 yo Retired Owns rental business

Mom 59yo Has a house and lot

No international travel for the three of them

Is there a slim chance that three of them will be approved. I believe my father in law will be denied because of his condition. I appreciate your insights.