I'm a first-time mom, due in February. Earlier I was having endometriosis. I got the best treatment. Finally, I am pregnant. Recently, I am having terrible constipation. I started taking Miralax daily. No more issues with constipation. My concern is that it's a class C and some doctors say it's fine but some don't. I had my 37 weeks check up yesterday. My doctor's concern is that I haven't gained any weight in 3-4 weeks. I should gain 1 lb per week. Now I'm worried that Miralax maybe the reason. I stopped gaining weight since then. Now have 2-4 bowel movements per day and that my baby may not get the nutrients he needs. I'd like to hear from others that have taken Miralax daily and if your baby was okay or not.