On being the right size

Depending on which book you read and how many weeks they count, Toblet is around 320g, covered in brown greasy goo to stop it shrinking in the wash, and growing fast.

I peeked ahead in one of the books. In ten weeks from now, 30 weeks, the baby will be more than three times heavier at over 1kg.

Unbelievable.

Try reading J B S Haldane, "On being the right size," found at http://irl.cs.ucla.edu/papers/right-size.html