There is a lot of variation among women when it comes to temping sensitivities. Some have to take it at the exact same time every day with at least 3 hours of sleep prior, with the same ambient temp, without any skin out of the covers, etc. Some are also very sensitive to stressors, strenuous exercise, travel, illness, injury, etc. Some have to take it vaginally b/c their oral temps just vary too much. I have also found that many women adjust to their sleeping circumstances whether that is sleeping through the night or waking 4-5 times a night and their temps reflect differences in that pattern.
Personally, I have always been able to see a biphasic pattern in my charts despite numerous nightwakings, breastfeeding, different waking times, different ambient temp, etc. And I know that others have success despite these things as well. So, while it is best to try and get your temp around the same time each morning, I would not go to great lengths to make it happen unless your chart is wildly erratic b/c of it. If your dd generally wakes you around the same time each morning, just temp then, before you get out of bed. I wouldn't wake myself up at 5am if I didn't have to! LOL! See how your chart looks and then go from there. Are you using www.fertilityfriend.com so you can share your chart for additional tips and opinions? :)
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