 [ Symptoms ] how long does thc stay in your fat cells i am needing to know about how long does thc stay in a persons fat cells my son has tested clean for about 9 10 drug tests and when he started lifting weights at school and going to wrestling practice he was tested again and it showed up positive for thc he says he has not smoked it for weeks is it possible that since thc is stored in fat cells that it can be released through increased activity [ Disease ] yes you should lay down for at least 30 mins to 45 mins after your inter course to get pregnant