Color me skeptical... people have been drinking for thousands of years. I would be terribly surprised if moderate drinking had a statistically significant effect.

Either way, this is an irresponsible recommendation at a time when birthrates among native populations are falling precipitously. Adding yet another mental/physical hurdle to having kids is the wrong thing to do. Shit, next generation in South Korea will be 40% the size of the current generation with the way things are going.