OTTAWA -- Far removed from Parliament Hill, Prime Minister Stephen Harper will host a three-day international conference in Toronto on child and maternal health.

The gathering, which begins today, follows on a promise Harper made at the 2010 G8 summit to help improve health care for women and children in poor nations.

Canada has so far pledged to spend nearly $3 billion to combat the problem.

Almost three million newborns die each year after birth, although the number of deaths of mothers in childbirth and children under age five has been cut in half since 1990.