(Closed) BBT – Does Time of Day *Really* Matter?

posted 6 years ago in TTC
Post # 3
5109 posts
Bee Keeper

@MySunshine:  For me, time of day REALLY matters and amount of sleep does not. I’ve noticed that differences of 20 minutes make a huge difference in my temperature. Like if I take it 20-30 min before usual, it’s much lower than the previous day’s temp. If I take it more than 45 minutes after usual time, it’s super high. My temp doesn’t seem to be affected by sleep as I have to get up to let the dogs out often at night, and if I do that 2-3 hours before my temp time, it’s not too far off of where it “should” be for that time in my cycle.

Post # 4
11325 posts
Sugar Beekeeper
  • Wedding: February 2011

I just got a LadyComp which is a little computer thing that takes BBT every day and predicts fertility. According to the literature/instructions the most important thing is that you get at least 5 hours of sleep, that you temp IMMEDIATELY when you wake up, before you sit up or feet touch the floor, and that you temp within 3 hours of when you did it the day before. So it sounds like for your travel, that should be fine. 

Post # 5
1431 posts
Bumble bee

I’m in the same boat. I work crazy hours and it is impossible for me to take it the same time every day since I flip back and forth from day to nights. I honestly have given up on taking my temp the past couple months because I just can’t remember I always wake up and forget to take it. Im going to try again this month and see if there is any kinda pattern. But as long as you get a solid block of sleep hopefully it will be ok.

Post # 7
2638 posts
Sugar bee
  • Wedding: November 2006

For me it was all about the restful sleep I got before temping. TOD really didn’t impact me much, even when I’d go to bed in the week small hours and not temp until 9 a.m. Everyone is different!

Post # 8
3314 posts
Sugar bee
  • Wedding: October 2010

Time of day hasn’t impacted my temps.  As long as I get at least 3 hours of sleep, my temps have clearly showed ovulation.  I was working shifts when I started temping last year and there was no way that I could feasibly temp at the same time of day.

Post # 9
1040 posts
Bumble bee
  • Wedding: January 2010

I know that the later I sleep in, the higher my temps seem to be. That being said, if you’re taking them at the same time of day (regardless of time), after 3 hours of sleep, they should be pretty consistent. And I think everyone is a little different anyhow – you might find that yours are super consistent anyhow! Best of luck!

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