FertilityFriend.com's Site Blog
Charting: Negative Pregnancy Test Before A PositiveIt's hard to resist taking a pregnancy test before one can reasonably expect a reliable result.When seeing an early negative test result, most people wonder if they could still be pregnant and if they might test positive later on in the cycle. If a negative test was taken too early, the answer is most definitely, yes (Check the Chart Gallery for numerous examples) however it is still interesting to look at some statistical data about these pregnancy test results. To explore the issue of the reliability of early pregnancy tests, we looked at just under 6000 charts for which a negative pregnancy test was followed by a positive test and did not result in a miscarriage. First Negative Pregnancy Test Before Positive
Average: 9.08 DPO First Positive Pregnancy Test After Negative
|
Posted: Nov 11, 2009 6:34am Eastern Time by Frederic, Founder.
Charting: Temperature Rise and Pregnancy - Stats StudyThis post is a follow-up on my previous post. I'll present below a few more results concerning the size of the temperature rise with respect to pregnancy.Among the numerous feedback we received, a few interesting issues were raised. I'd like to discuss it below. Lopsided Histograms Temperature Scaling |
Posted: Aug 18, 2009 10:02am Eastern Time by Frederic, Founder.
Charting: Average Temperature After Ovulation - Stats StudyWith this post I'd like to share with you a few stats results about average post-ovulatory temperatures (BBT) and pregnancy. These are preliminary results intended to give you some material for comments and feedback.We looked at the average temperature between 1 and 10 Days Past Ovulation (DPO). The reason for looking particularly at this phase of the cycle is that we often see people looking at their average post-O temperatures as a potential early pregnancy sign. For this study we have randomly selected a set of 1000 pregnancy charts and 1000 ovulatory charts (see the Chart Gallery for examples). For each chart we calculated the average temperature between 1 and 10 DPO. The histogram below shows you the distribution of temperatures (in Fahrenheit) for pregnancy charts:
The histogram below shows you the distribution of temperatures (in Fahrenheit) for ovulatory charts: |
Posted: Aug 07, 2009 9:49am Eastern Time by Frederic, Founder.
Charting: Follow-up - Seasonal Variations of Temperature (BBT)As promised I went through the large number of comments we received on my last post. First let me thank the hundreds of members who sent their thoughts and comments with so many insightful and valuable input. You will find below a summary of the input we received. I am certain that I am not doing justice to all feedback. My goal is to provide you with the main ideas.Data Sample Many members were concerned that the data sample may include people in the southern hemisphere which may skew the data. Let me put this concern to rest, the data presented only included data from the United States. It does not include data from the southern hemisphere. We also considered a larger data set and saw similar patterns. To avoid any possible confusion we decided to present only a restrictive subset. Some members feared that we did not have enough data to show a significant plot and that a few people with abnormal temperatures may have skewed the data. The data set includes only a subset of the data we have available in order to run the calculation quickly. It however includes several hundreds of thousands of data points per months. |
Posted: Jul 19, 2009 9:21am Eastern Time by Frederic, Founder.
Charting: Seasonal Variations of Temperature (BBT)While mining FertilityFriend.com's abundant data to design new charting tools, I wondered about seasonal variations of the BBT: Would it be possible to see it in the data and what would it look like? To find out I simply calculated the monthly average of all BBT data collected on the site for each month. We have data spanning over more than 10 years, but I just limited the current plot from 2005 to now as it shows clearly the basic pattern.Graph The graph below plots on the vertical axis the average BBT in Fahrenheit (click here for a graph in Celsius) and on the horizontal axis the month. January 2005 is labeled 200501, February 2005, 200502 and so on, up to June 2009 labeled 200906. Click on the graph to see an enlarged version. Description What I found striking is the actual pattern that you can see clearly on the graph. The average is always lower for summer months (dip clearly in July) than for winter months in any given year. The trend over the years seems to be of decreasing BBT. Keep in mind though that these variations are small and would not really affect your chart or its interpretation. |
Posted: Jul 09, 2009 2:01pm Eastern Time by Frederic, Founder.
Site News: New on Tickerfactory.comNew Debt, Savings and Fundraising TickersWe have just launched debt reduction, savings and fundraising tickers. These tickers are designed to track situations such as: saving for a house or your next vacation, trying to reduce your debt, paying off your mortgage or loans, and fundraising. Check them out: TickerFactory.com New Rulers and Sliders Weight Ticker New Features
|
Posted: Apr 23, 2007 6:23am Eastern Time by Frederic, Founder.
 | Easier Than Ever: Earn Free VIP Days with each new member that you refer to FertilityFriend.com: New Referral Program |
My temperature has dipped below the coverline during the luteal phase. Does this mean I didn't really ovulate? Could I still be pregnant? Read More... IMPORTANT: Text, data, graphics, graphs and photos presented on this page are intended for personal use only. Any other usage as well as any derived work (papers, studies, re-prints, reproductions on web sites...) is prohibited without explicit written consent from Tamtris Web Services Inc., owner and operator of FertilityFriend.com.
FertilityFriend.com is a trademark of Tamtris Web Services Inc. All other trademarks are the property of their respective owners.