Which of the following is a true statement according to the passage?
The increase in pregnancies among women over age thirty-five and the increase in the use of reproductive therapies result in the increase of preterm birth rates.
Fortunately, many people have already realized the seriousness of the problem of preterm births.
Preterm births must be a problem for only poor areas because of poverty.
Preterm birth rates in developing countries are dropping and they are increasing in some developed countries like the US and Canada.