Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Depending on how often someone smokes and how much and body construct , marihuana cleaning from urine varies from 10 - 90 days. According to what you refered you may need 30 days for urine to come clear. I don t recommend you detox ways because most of them are risky and not allowed by FDA to be used in pregnancy. Hope I have answered your query. Let me know if I can assist you further.