The ovaries in attendance at AllThingsD's D11 conference were in for a surprise this afternoon when they learned PayPal cofounder Max Levchin intended to disrupt them.

Just months ago, the serial entrepreneur and investor had his eyes set on your average out-of-body smartphone power user problem—mobile payments. But it seems the female reproductive system is fair game for some good ole Silicon Valley solutionism.

Called Glow, the company has built a fertility tracker that uses cutting-edge data analytics and published information on ovulation cycle forecasts to help advise a woman on the best times for her to conceive.

Users must enter in personals details about their menstrual cycles, their body temperatures and other habits to inform the Glow app. According to Levchin, the app adjusts to the individual as she logs more and more data.

It's hard to say how Glow is different from the existing fertility and ovulation calendars out there, or whether the difficulty for women hoping to conceive is primarily just an issue of timing. Before someone opts for costly and invasive IVF treatment, presumably they would already track this kind of personal info, which might be why women remained skeptical that an app might solve the problem.

And that ladies and gentleman, is how you get to hear the words "cervical mucus" and receive advice on "a good time to wear good underwear" at a tech conference.

At the very least, it sounds like the startup world is growing up from twenty-something problems to thirty-something ones.

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