Those of you who charted to get pregnant...I have a question for you.

MJN9510

So, I have a friend who is TTC and I was telling her about charting because she is never sure when she ovulates.  I never did the charting thing so I dont know a ton about it but i do think you are supposed to check your temp at the same time every morning and do it while you are still laying in bed right?  Well, my friend works 3rd shift 2 or 3 days a week.  So, when she works 3rd, she obviously wouldnt be able to check her temp that morning because she has been up all night.  Does this mean charting will never be accurate for her?  Anyone know what suggestions I can give her?

 TIA