can you systemize your uterus?

From today's Social Studies. i.e. ripped off from The Sunday Times of London.

The gender of your children may depend on your choice of job, say British researchers.... In the general population, 105 boys are produced for every 100 girls. [According to the study], among engineers and other "systemizers" [like accountants] the ratio is 140 boys for every 100 girls. Among nurses [and teachers] and other "empathizers," the ratio is 135 daughters for every 100 sons.