HI, I'm a pediatrician. It's a very interesting field, taking care of kids and babies. 
That's pretty cool. I'm an environmental engineer. I help clean up the world with engineered systems. Do you have any kids of your own?
I do, I have two of them. One was actually in the NICU when he was born prematurely. My training has come in handy!
They will probably grow up to be lovely children! I don't have any of my own yet, but still tons of time!
It's really rewarding and I hope you do end up with kids if you decide you want them! It's very rare to have a preemie, so I hope I haven't scared you. No one really knows all the causes of preterm birth but usually everything turns out fine!