since water takes a long time to heat up and a long time to cool down, land masses along these coastal regions have more moderate temperature ranges than those of land masses inland on the same latitude
Infant mortality rates would decrease. Greater quality or more widespread health care makes medical experts more accessible, so more people would have access to doctors and high-quality resources when their infant needs it.
A greater population would use contraceptives. Health care makes health supplies more accessible. More people would be able to afford and attain some form of contraceptives.