Nutrition while pregnant post-RnY

I am just beginning to try to get pregnant, but I have been trying to prepare as best I can.  I am 4 years out from a successful gastric bypass, so I know I'm in the clear as far as time passing after surgery, but I have been searching for some clear guidlines for nutritional needs/issues for post gastric bypass patients who are pregnant.  Do we absorb nutrients differently?  Should I try to get in more veggies?  What supplements should I take?  I want to eat as healthily as I can but I'm not sure what I need to focus on for me and a baby.

I had my first baby at 4 years post op and my 2nd most recently at almost 10 yrs post op RNY. I took prenatal with DHA, iron due to anemia and that was fine. I was told to increase calorie intake by about 300. I tried to stick to a proteins and fruits and veggies with lots of water and minimize my carb intake and sugars. Foods with folic acid are also recommended. Otherwise didn't do anything special. My son was born at 37 weeks and weighed 6 lbs 7 oz and my daughter was born at 39 weeks and weighed 7 lbs 13 oz. I had no major complications with either pregnancy.