This seems counterintuitive, but turns out that as infant mortality is reduced, population sizes also decrease, because parents don't need to anticipate that their babies are going to die.
Pare ilogic, insa, s-a descoperit ca odata cu reducerea mortalitatii bebelusilor scade si numarul populatiei, deoarece parintii nu mai sunt nevoiti sa anticipeze moartea copiilor lor.