A little chart help?

Question

ok, here is my chart:

http://www.fertilityfriend.com/home/21f30f

it suddenly showed up as me ovulating on CD23. Why not CD21? Doesn't that day seem just as good?

Also - is it normal to ovulate this late in the cycle after being off BCP since May? I am not sure how long before my cycles will return to the way they were, or if I will ovulate 'different' now since taking the pill.

Any suggestions/advice would be great. Am TTC #1 starting in September and would LOVE to know when I ovulate!!!!

Answer 1

Your high temps right after cd21 are not higher than the previous six days....whereas the temps after cd23 are.  

Answer 2

One simple answer... that's not a very good set of temeratures to determine ovulation.

You just don't have the proper set of days below a cover line followed by a temperature that really jumps above the cover line.

To really learn to chart properly, I'd suggest reading the book "Taking Charge of Your Fertility".  But here's a couple of high points to keep in mind.

You must take your BBT before you do ANYTHING first thing in the morning.  That includes sitting up or getting out of bed.  So the night before, you have to make sure your thermometer is EASY reach.

You must get at least 4 hours of uniterupted sleep prior to waking and taking your BBT.

You must take your BBT about the same time every day.  If you should sleep in, you have to adjust your temperature to account for the change of time (it's something along the lines of your temp will increase 0.1 degrees for every hour you sleep in, so you have to adjust your reading down 0.1 for each hour you slept in (or is 0.1 for every 30 minutes?)).

Room conditions need to be the same each night.  If you sleep under the covers one night, and without any covers the next, that's going to change your temp.

Oral temperatures can be effected by if you sleep with your mouth open or not.  For more consistant temperature readings, you can take your temperature vaginally.  However, because oral, rectal, vaginal, under the arm, etc reading are different, what ever method you start with at the beginning of your cycle, you should use for your entire cycle.

Answer 3

its not showing CD21 to be your ovulation day  because the following 3 temps after that day aint higher than the last 6 days temps. :)

Answer 4

FF placed it at CD23 because it is the first day before three higher temps than your coverline.  I am on three months off of BCP and my cycles are 47 days long with ovulation around CD 36.  I spoke to my doctor last week and if in a month or two it doesn't go back to my cycle length that it used to be for going on BCP, then we have a problem.  Best thing is to visit your doctor for a pre-conception checkup and discuss your cycle