“Male Flight”

Apparently it exists:

One of the most fascinating phenomena driving gender changes in the workforce, [The Richer Sex author Liza Mundy] says, is that of male flight, the tendency that men have to lose interest in or abandon a profession as more women enter it. Researchers have said that men show an aversion to what’s been termed gender "pollution." As women begin entering a field, the most cited example being veterinary medicine, younger men begin to show less interest in that area of expertise. Older, established male veterinarians don’t leave the field, it’s just that the rising classes of veterinarians turn overwhelmingly female. Some researchers have predicted that this example can be used to predict what we’ll see even in traditionally male professions like law. "The women pour in," Mundy observes, "and the men drain out."