First of all, i think theres something that i need to clarify for my country.
There's absolutely no Obstetric Ultrasound in China. And the main reason, abortion. It's illegal to get an ultrasound at a hospital. So its unlikely to have an abortion. AND because of the one child policy, women getting an abortion could end up losing their opportunity to have another baby when theres an error in the operation.
And with the one child policy. Believe me, only 50% of the population is following that so called policy. I live in a city, and my uncle have 3 kids. Passport and citizenship could be bought as long as you have cash. And people who lives in the country sides..haha normally they have 3-4 kids ATLEAST.