I have never had this happen to me. DH's family has said that they want us to have a baby, they have been saying this since we got together. (I was 19 an DH was 23.)
My family has never even mentioned babies to me. (Other then at my bridal shower when my MIL was asking some of my family asked as well but other then that they have never said anything about babies.)
DH's parents say this to us all the time. I think they're just trying to be nice to us, because DH's twin brother accidentally got his gf pregnant a couple years ago and since then, a few people have been bugging us TO have kids. And I think his parents know that that probably bugs us too, so they always say to just enjoy being married, young, and have fun for now. I get why they're saying that to us, but it's annoying from all sides.