How to have a baby conversation with spouse?

My fiancé and I got engaged last year, we've always wanted children. The one thing that is important to us is that both of our parents be around one for our wedding and two for when we have our first child. There are many things that we've talked about when it comes to having a child like timing, finances, and when is the right time. I am just wondering how other couples have had the conversation of wanting to start trying for a baby. The two things I want is to have my dad around for the wedding and both of our parents still around for our first child. I know I'm getting closer to a high risk pregnancy age and would like to have a baby before I'm there.
How to have a baby conversation with spouse?
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