Hi Gracie - I don't think Optifast is recommended for pregnant/breastfeeding mums as it is a very low calorie diet.

You'll be surprised by what a little excersise can do for weight loss. Eating a moderated diet as well as excersising for 30 minutes EVERY day will help. The trick when excersising is to start your half hour when your heart rate is high (usually 10 minutes into a fast walk or jog) and maintain that heart rate for the entire 30 minutes.