"With a triphasic BBT chart pattern, there is a third, sustained upward shift in temperature, usually occurring around 9 days post-ovulation.
"Since progesterone is the hormone that causes the upward shift in temperature at ovulation, the theory is that increased progesterone from pregnancy might cause another upward shift in temperature.
"12% of all pregnancy charts showed a triphasic pattern. When looking at non-pregnancy charts, they found that only 5% of charts showed a triphasic pattern. So, based on this data, you have about three times more of a chance of being pregnant with a triphastic chart, than without."
Sounds like good sign! [IMG=http://www.singaporemotherhood.com/forumboard/clipart/happy.gif]