Does Ashtanga Vinyasa Cause Miscarriage?
Let's just open with the fact that Pattabhi Jois suggests pregnant women not practice for the first three months of pregnancy.

Is there a correlation between an ashtanga vinyasa practice and miscarriage?

Purported statistics, of which I will track down sources later, report a frequency as high as one in four in the general population.

How do those statistics transfer to the yoga asana practice? Can we draw a correlation between the rate of miscarriages by women who practice similarly physically demanding activities, say, ballet, gymnastics, dance?

Anecdotal evidence, on my end at least, is thin --- the vast majority of women I know who have miscarried --- a number that grew quite large last year --- were, to put it politely, rather sedentary, and practiced no yoga at all. I have also known several women with third-series practices who have several children. Anecdotal evidence in this case is absolutely worthless.

What does any of this mean to you, a woman with a vigorous daily asana practice who is considering pregnancy? What certitude or assurances or peace of mind can any such statistics provide? I wish I could end this with more than a question.