Determining the Coverline Pre and Post Ovulation on BBT Chart
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13 January 2017

Determining the Coverline Pre and Post Ovulation on BBT Chart

Determining the Coverline Pre and Post Ovulation on BBT Chart
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Written by Dr. Surveen Ghumman
BBT chart is a type of ovulation calculator or fertility calculator to help you easily see a temperature shift with information about cycle and ovulation calendar

BBT chart is a type of ovulation calculator or fertility calculator to help you easily see a temperature shift with information about cycle and ovulation calendar

A cover line is a horizontal line drawn on your BBT chart to separate your pre- and post-ovulation temperatures. Keep in mind that this is really just the separation of the 2 phases of your menstrual cycle: the follicular phase and the luteal phase. While the line itself doesn’t have any physiological meaning, it is designed to help you easily see your temperature shift, along with some other helpful information about the health of your cycle. It is a type of ovulation calculator where you can track your ovulation

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How to Draw: For some, drawing a cover line can get a little tricky or feel a bit cumbersome, but we’re going to break down how to do it step-by-step, according to the Fertility Awareness Method Rules first. 

1. As you’re charting, keep an eye out for the pattern of temperature for 3 days that appears higher than the previous 6 days. Okay, you might be wondering what counts as a “higher?” Well, “higher” means anything at least two-tenths (0.2) of a degree Fahrenheit above the previous 6 days. (although 0.4 is better). You can also use it as fertility calculator. 

2. Once you’ve identified those 3 days, take note of the previous 6 days.

3. Next, find the highest temperature of those 6 days and then draw a line through one-tenth (0.1) degree Fahrenheit above that temperature.

Here’s an example: if your highest temperature in those 6 days is 97.5 degrees F, then draw a line through 97.6 degrees F. (Remember, your line should be straight.) Voila! This is your cover line. it can aslo be used as ovulation calculator or ovulation.

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Ideally, the rest of the temperatures during your luteal phase will be above this line, but sometimes factors like hormonal fluctuations or imbalances that can cause dips. The rules described above are based on the Fertility Awareness Method, and this works best for those with clear BBT patterns. This can also be used as ovulation calendar or fertility calculator. 

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3 Comments

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Jessica Wilson
Aug. 23, 2017, 4:16 p.m.
Ovulation calculator or ovulation calendar can even help women with pcod. They can check whether the medications are working well with the ovulation or not.
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Ava Williams
Aug. 23, 2017, 4:27 p.m.
Fertility calculator has helped no of females to track their ovulation and get successful pregnancy.
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Trisha Malhotra
Aug. 23, 2017, 4:28 p.m.
I too checked with ovulation calculator and it gave me best results.
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