Yes. It was an OBGYN with 30+ years of experience. The second one for my second child, who was not as experienced(about 15 years of experience), said the same thing.
And no I wouldn't knowingly feed them Mercury-laden food, but you're talking about eating fish. You don't let your kids have any kind of fish? Do you eat fish?
From what I understand, nobody should be eating too much fish. Just ask Jeremy Pivens and his brush with death over eating way too much sushi for months on end.
http://www.people.com/people/mobile/article/0,,20247781,00.html
Lawn care tips? What kind of doctors do you have where you're from? Mine just give out medical advice.