There is a great interest in identifying very early pregnancy signs on charts. Which signs can tell you that you might be pregnant? Which are meaningless? To try to answer this question quantitatively, we have run some statistics on a large sample of charts.
One of the most controversial and puzzling potential signs has always been a luteal phase dip (Luteal Dip). There has been a lot of speculation about the significance of a temperature dip in the days after ovulation around the time implantation would be expected. We wanted to get to the bottom of the issue and find out once and for all if seeing a dip in the luteal phase, around the time of expected implantation, increased the probability of pregnancy.
Here is what we did:
We ran a statistical analysis on 1.5M+ charts recently processed by Fertility Friend, both pregnancy charts and charts that did not result in pregnancy.
To be considered as a luteal dip, charts had to show a significant temperature dip that lasted a single day, occurring between 5 and 12 days past ovulation. The dip is identified automatically by Fertility Friend pregnancy monitor.
Please note that the exact pattern is identified specifically by the pregnancy monitor Luteal Dip detector. The statistical results presented here relate only to the pattern identified. You may see on your chart something looking like a dip but that would not mean that you could expect the same odds. Check the Luteal Dip detector report to see if your chart fits the pattern discussed here.
Here is what we found:
The dip is present in both pregnancy and non pregnancy charts. Our detector is very selective as to avoid detection of unclear pattern as much as possible.
For pregnancy charts the dip is observed at an average of 8.6 DPO.
This pattern is observed on 1.6% of all charts. It is pretty rare due to the selectivity of our detector.
Charts exhibiting this pattern are 79.8% more likely to be pregnancy charts than non pregnancy charts.
The data suggest that this pattern is indeed more likely to result in a pregnancy.
Remember, though, if you have this pattern, it does not necessarily mean that you are pregnant. It is just increasing your probability.
No matter your chart pattern, you can still be pregnant as long as you have well-timed intercourse within your fertile time. In the end, the only way to really know for sure whether or not you are pregnant is still when you can reliably take a pregnancy test.
See also: Cause of implantation dip.
Access The Pregnancy Monitor:
Within the App, tap the button in the Fertility Analyzer section on the main screen. Alternatively you can tap the Analysis tab and select Pregnancy Monitor.
The Luteal Dip detector is displayed in the Early Pregnancy signs section. Tap the Early Pregnancy sign button at the top of the pregnancy monitor screen to display that section.
Note: This article is updated to match the characteristics of the Luteal Dip detector provided as part of Fertility Friend's Pregnancy Monitor.