Due date statistics: A study on the length of pregnancy

Do babies come on their due dates? This was the question on my mind during the later stages on my pregnancy in the spring of 2010. I heard a lot of conflicting information about what a "due date" meant and when babies were born. Some people…

Download Due Date Survey Data

I used to have a raw table of all data at the end of this survey but as the file got bigger, I decided to go another route and provide a once-in-time csv snapshot. There are about 13,000 records in this file which should be enough numbers to occupy al…

How do inductions bias the due date statistics?

I wanted to make this simple data table after many visitors posed this question: "We know that many women are induced for to avoid going postdate, doesn't this bias our data?" Fair question. Most of the graphs I have just throw out indu…

Are boys or girls born later?

What babies earlier, boys or girls? I didn't ask questions about this until the survey had been running fr a while but added the question later, in case it showed anything shocking or interesting. It didn't, really, but here are the results. …

What if I know my conception date?

In the survey, 35 participants claim to know their exact conception date. This is rare; most due dates are measured from last menstrual period because it's easier to track. But the general question that always comes up is "Would my due…

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