Hi! I am a concerned mother/grandmother. My daughter was overweight when she got pregnant, but she is at 16 weeks, got pregnant with the mirana and had to have it surgically removed. She has been sick and vomiting most of her pregnancy and has lost 40 pounds, from 250. She does smoke cigarettes and she does smoke pot. Do you have any recent studies that show that it affects the baby so I can show her. Her husband said it doesn t, but I feel like it could.