Is the Whole30 safe for pregnant and breastfeeding women? in Whole30 while pregnant or breastfeeding Posted May 20, 2013 I am on day 5 of my whole30 and I am breast feeding my 9 month old.... He is going through a growth spurt so he is drinking a lot of bm at this point. I haven't seen any drop in supply. I do snack throughout the day when I feel hungry. Fruit or carrots are my go to snack right now.