Tinier-than-average babies may be cute, but they face a whole host of problems down the road, not only through infancy and childhood but as adults as well. Recent research performed by the National Institute on Aging suggests that babies born at less than 5.5 pounds face significant and lasting effects from the low birthweight which proves a link between birth weight, adult health and socioeconomic success. (My youngest son weighed 5 pounds 2 ounces...)
35 years of data on more than 12,000 people were analyzed to see how well-being and
disadvantage are transmitted across generations within families. Kids with low birthweight scored significantly lower of tests, had a higher number of health problems in adulthood, and even earned less money that did their average-weight siblings, and in turn, these disadvantages were passed along to the subsequent generation.
I don't even know what to say about this, other than do your best to take good care of yourself during pregnancy. Which I know you're already doing. But sometimes there are outcomes that we can't predict like my son's (Down syndrome), but I already know that his choices may be limited in adulthood and that his health will likely be affected. But many babies are just...tiny, with no medical or developmental reason. And they're the ones I most want to give a hug to just about now.