i am the daughter of the first post, and i was wondering which would be easier to do...and how accurate it would be in a 8 week preemie...hes got some of the symptoms, or atleast one that i know of so far, and thats the meconium plug...and with having that, is it a sure sign that hes got cf? ive tried to look up information on it, and i only found the basics about it...im just glad that my mom found this site...