FMU versus 4HH?

posted 3 years ago in TTC
Post # 3
3769 posts
Honey bee
  • Wedding: December 1999

If you hold it for 4 hours, don’t drink anything either is your urine will be more concentrated.. The reaosn FMU is best is because you typically aren’t drinking during the night (which would dulute the hormones in more urine). If you can go that long without peeing or dirnking you should be fine. Good luck!

Post # 4
3756 posts
Honey bee
  • Wedding: April 2014

To be honest with you, everytime I’ve gotten a positive, it didn’t really matter if it was FMU or at any point during the day. At 13 dpo you should be safe to test later in the day. I would avoid drinking a lot of water so it’s not too diluted but you don’t have to kill yourself waiting 4 hours. If you really have to go, then go and test. 

Post # 7
490 posts
Helper bee
  • Wedding: July 2013

@jny1179:  Thanks for this answer!  I was debating the same thing myself and this helped me decide!

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