To tell you the truth, I don't know the fact that South Korea' fertility rate drops below one. South Korean's rate of people who are older than 65 is lower than Japan, but fertility rate is lower than Japan.
Today's new word is "paternity leave". This for fathers, not mothers. Surprisingly, in Philippine, there are only 3 months for maternity leave. In general, grand parents are living in neighbor. Therefore they help to raise children.