1 or 2 embryos?

Dominique • Ttc for 6 years. Both tubes removed in Nov 2014. Ivf in Feb!
So we're doing our first round of <a href="https://glowing.com/glow-fertility-program">ivf</a> this month. We are sure we only want 2 kids. Our doctor told us we have the option of transferring 1 or 2 embryos on transfer day. I can't lie, part of me wants to do 2 and get it over with! But I know there are added risk with twins like premature babies and more so I want to be cautious and only transfer one. So my question is...have you or has anyone you know, been pregnant with twins? If so, what problems did you/they face during the pregnancy?