Roughly 50 percent of parents report having an 80 percent preference for 50 percent of the sexes.

In other words, half of all parents want a boy or a girl. I know I did. The first time I was pregnant, when the ultrasound tech waved her magic wand over my belly and announced that the little one inside me was female, I yelped in delight.

My husband was less pleased, but gradually did learn to accept the mountains of pink accumulating in our new nursery even though he fought—and won—a battle over the nursery walls after I had an ill-advised attack of girliness five months into my pregnancy and demanded a pink-and-white striped Eloise-themes nursery.

Let’s just say it is sometimes good to have a man around and leave it at that.

Moving on….I had always wanted a daughter and was thrilled with the result, but I was not surprised.

Six weeks earlier, just after the pee stick had dried, I broke out the computer, Googled gender and came up with this predictor.

Simply plug in the mom’s age, month of conception and voila! You know whether your little bundle is to be clad in pink or blue. The predictor, which has no basis in science or logic, boasts a 90 percent accuracy rating, which is roughly what my equally unscientific polling has revealed as well.

For me, for my husband, for our parents, for our friends’ kids and for at least a dozen Facebook friends, this thing worked with 90 percent accuracy.

Let it be revealed that ultrasounds—those modern marvels of reliability--are only 90 percent effective at revealing the sex in my experience. I know at least as many people who were surprised at delivery after thinking they knew the sex thanks for ultrasounds as I do people for whom the Chinese Gender predictor was wrong.

This works. I have no idea why, but it does.

See for yourself.