This doesn't sound malicious, it sounds like maybe he was concerned for your wife. Perhaps she looked a bit pale or tired that particular day. Perhaps your presence at the appointment (rather unusual) gave him concern that there were control issues in the marriage.
I'm sure you are a loving husband and you make sure she has time to herself and to go out with friends. It is so important to do so in order to keep your sanity when spending the day with small children!
Otherwise, he didn't force her into birth control so just let it slide off your back.
Maybe living surrounded by like-thinking folks you have lost a bit of perspective. Always good to meet new people!
Why are my wife's choices any of his concern? Can't she just state her course of action and be left alone in it? Is she harming someone by not using birth control? Not that we are aware of.
Perhaps your presence at the appointment (rather unusual) gave him concern that there were control issues in the marriage.
(Hypothetical) So what if there were control issues? Why is that his concern? He's a doctor, not a marriage counsellor or a divorce lawyer. Is he a party to our marriage? I don't think so.
Otherwise, he didn't force her into birth control so just let it slide off your back.
But these sort of intrusive suggestions just keep coming. Take too many children to the grocery store, and you get a lecture on birth control and "don't you know where children come from", etc., etc.
Maybe living surrounded by like-thinking folks you have lost a bit of perspective.
We know relatively few people who think like us.