You got the call! An expectant mom (and dad) would like to meet with you! It's the most important "job" interview of your life, so what do you wear?
I googled "what to wear" and there was some good advice and some interesting advice like wear something comfortable or don't wear expensive "dry clean" fabrics because you want to look like you're ready for baby puke. You also don't want to look unrelatable or like you're trying too hard. Before our big meeting, I bought several outfits, got a manicure and decided the day before that I needed a haircut. I was so nervous I thought I was the one going to puke.
The outfit should reflect who you are, it's the first impression that you make. What you wear should make you feel confident. It's not the time to try the latest trend and you definitely don't need to buy something new. I did because I am a spaz. You're likely to be very nervous in the meeting, so a breathable fabric might be a good idea or wear layers. And make sure everything fits well. The last thing you want is to be sitting with someone for an hour and your pants are a little too tight or your bra strap keeps showing.
I took some cues from Frankie, the TV mom on The Middle. She's a busy mom with good sense of style and cleans up well. For me, you can't go wrong with a nice pair of pants, a top that shows some personality and sweater. For the guys, I think slacks and a button up shirt with no tie or jacket is just fine. The goal is to look put together and casual but not too fancy or too casual, right in the middle - This is just my two cents, so wear what makes you feel your best.