Very true notanan2!
My mother was convinced that one of my daughters had 'knock knees' (she didn't), they were all too pale and far too thin, oh, and they couldn't hold a proper conversation or do as they were told (they didn't really want to).
Her worries stemmed from my being a vegetarian, breast feeding, working mum. In her mind that meant they were terribly deprived and neglected.
She was concerned that my eldest daughter didn't crawl (until she suddenly started walking at nine months) and worried that my second son didn't utter a word at two and a half. When he did eventually speak, at nearly three, he spoke in complete sentences!
Unfortunately, I took all of her concerns as direct criticism of my relaxed parenting style. Of course, all four of them are very healthy, clever, happy and successful - funny that!