I'm probably a bit late, I dont come on here very often... but I have a 4 year old son and while pregnant, I used the pump, an Animas. Currently I use an Animas One Touch Ping. I was diagnosed with T1 when I was 18 (1993), and went on the pump in 2001, prior to that using Multiple Daily Injections. I had my son in 2006. So I had some years of pumping experience before conceiving, which I do recommend, for the reasons another poster listed. But with the demands of a pregnancy and the CONSTANT monitoring and corrections it requires, I would completely recommend the pump. Think about your 8 injections per day multiplying when it comes to corrections-- and with the pump you can correct in such small increments- it really makes a difference. I did "well" throughout my pregnancy, never going above 6.8%, which is good for me, my diabetes has always been very stubborn and requires a lot of insulin. By the end of the pregnancy, you are also taking at least twice as much insulin as at the beginning. We all know that the tighter control that you have during your pregnancy leads to better outcomes so why wouldn't you make it a little bit easier on yourself by using the technology that helps you acheive better control? We are considering another child now, and if I do start TTC, then I will definitely look into a continuous glucose monitoring system in addition to my pump to even better my chances at good control.
My son was born healthy and did not have symptoms of hypoglycemia at birth. He was a large baby (9lbs 7oz), but honestly, I'm not sure if that had to do with my diabetes or just that he was a big baby- he's been at the 95th% his entire life! My practice was extremely supportive throughout the pregnancy, and it is a lot of work to be pregnant with T1, but totally worth it, of course!!
I HIGHLY recommend the new book by Cheryl Alkon, "Balancing
Pregnancy With Pre-existing Diabetes:
Healthy Mom, Healthy Baby" -- It's really the first book written by a T1 mom who interviewed hundreds of women who went through pregnancy with T1 and pre-existing T2.