I have a family friend who is currently struggling with infertility. How do I gently, but still encouragingly, motivate them to keep trying for a baby?

Do they open up with you? If yes, whenever they share and just say that you'll pray/support them in their journey. If no, I suggest not to mention anything even if your intentions are good. We are a "TTC couple" for 4 years and I don't like the feeling whenever there are people who voluntarily opens up the topic about us having a child. I know their intentions are good, but it feels like they are pressuring me. It's not a good feeling especially we are doing everything on our end (including workups).