China's family planning service, or one-child policy, is facing challenges posed by the increasing migrant population, Xinhua reported.
The number of married women at childbearing age in the country's migrant population came to a total of 67 million last year, accounting for about 25 percent of the national figure, said Wang Xia, Minister in charge of the State Population and Family Planning Commission.
Among the mothers in the migrant population, more than 60 percent have given birth to their children in provinces away from where they hold their household registrations. The family planning authorities aren't always able to monitor whether they give birth to more than one child as the current service lacks investment in the development of national database.
Over the next 20 years, more than 300 million rural residents are expected to move into cities and how to incorporate them into the public services system remains a big problem, Wang said.