34 with my first, the day after I turned 38 qith my second. 37 is the average age for a new mom around here too. I was the second youngest in the new mom mother's group. The youngest was 24, though.
I delivered at a hospital where the average age of the first time mom is 37. I felt like a teen mom at birthing class, it was great LOL. If you are in the DC area I can tell you where to take baby classes for baby #2 (not that you want to sit through it again).
This is probably the hospital I delivered at, I was 36. The average age for first time moms in my OB's practice was 38. DC skews old.