What is a Triphasic Chart?

You may have heard the term triphasic chart or triphasic pattern and wondered what this meant.  A typical ovulatory bbt chart is considered a biphasic chart – meaning two phases.  A triphasic chart means that it has three phases or three sustained temperature shifts.  The third shift usually takes place sometime around 7 to 10 days after ovulation and may correspond with the timing of implantation.

The reason that women see a shift in their body temperature after ovulation is due to an increase in progesterone secreted from the corpus luteum.  Once implantation occurs progesterone levels may increase again.  In some cases, this can be seen on a bbt chart.  

Is my chart triphasic?

If you can see two sustained thermal shifts on your chart you may have a triphasic chart.  However, some charts that are triphasic are not quite as easy to spot.  One example of a triphasic chart is one that has a slow and steady climb followed by a second steady climb.  

But, it is also common to see a chart that has a sustained thermal shift after ovulation, followed by a slight or even dramatic dip in temperatures around 7 to 10 days after ovulation, and then followed again by an even bigger increase in temperatures.


Does a triphasic chart mean you are pregnant?

The short answer no.  A triphasic pattern on your chart could be an early indication of pregnancy.  However, having a triphasic pattern doesn’t necessarily mean that you are pregnant.  If you do have a triphasic pattern on your chart though consider it is a good sign because it is more frequently seen on pregnancy charts than non pregnancy charts.  

No votes yet


By RebekahTanaka on 06/16/13 at 10:22 pm

I also recommend the PREGNANCY MIRACLE METHOD to get pregnant fast and naturally!

Sign in to leave a comment!

Today on JustMommies


From the Message Boards

Am I Pregnant

So confused.

So I have PCOS. I have been trying conceiving with fertility treatments and nothing is working. My h...

Trying to Conceive

Trying for two months nothing yet :( opinions?

Hi guys,So a little about myself first :) My name is Taylor I am 19 years old (yes I know I'm young)...

Trying to Conceive Your First Child

Trying to get pregnant for two months now, nothing! :(

I had the birth control rod implanon in my arm for a year. I got it taken out in September. I've bee...

Trying to Conceive

Well i'm out...So......

Onto next month. again. I'm beyond bummed b/c I thought we timed BD pretty well but I realize it w...

Trying to Conceive


I knew I had been having little feelings of nausea! Sorry, it's not the greatest pic out there...

» Check out the friendliest message board for moms and moms-to-be!