Esther,
I am a firm Atkins believer, stayed a size 4 for two years on it..however, I would not recommend the Induction Phase of his plan, 20 grams or less,,in other words , full ketosis for those women who are lactating/pumping. His Maintenance Phase is recommended for pregnant and lactating women, which would be around 60 grams of carbs per day.
Thanks, Cathy