Modern technology allows for highly accurate gender prediction, yet even science occasionally misses the mark. The Chinese Gender Chart bases predictions on Chinese months, not the Gregorian calendar used in the West. The Qing dynasty gender chart is the original gender selection and prediction calendar, but its popularity means there are thousands of options available on the Internet, many of which use inaccurate methods. True believers of the Chinese Gender Chart say the accuracy ranges between 70 and 75 percent.

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