<s>[INST] Something has been bothering me greatly over the past few days. I am 14 weeks pregnant and have been abstinent from marijuana for 60 days. However, last week when I went to my prenatal visit my drug test came back positive for marijuana. This has bothered me because I quit smoking before I even knew I was pregnant, but the thc is still in my system! I am overweight, with a BMI of 38. Is this the cause of the marijuana taking so long to get out of my system? I know it is stored in fat cells. Thanks. [/INST] Hello, As you might be aware that active ingredient in Marijuana, is fat soluble. So, if you have BMI of 38, there can be more fat percentage in your body as compared to total body weight. That can be one reason for slow excretion of the substance out of your body. Secondly, I will suggest you to opt for a healthy diet and regular exercise regimen. Aim for BMI below 28, ideally below 24. Include more portions of fruits and vegetables and salads in daily diet. Avoid refined sugars and deep-fried foods and bakery products in the diet. Weight loss will help you to avoid various medical problems as a person and will also help to prevent various complications during pregnancy and childbirth. Hope I have answered your query. Let me know if I can assist you further. </s>