English sociologists concluded that average age of women giving birth in many ways may depends on what country they live in - north or south. And age difference between young mothers is up to 10 years.

Inhabitants of northern regions tend to give birth for the first time in the age of 20 years, while southerners gave birth mainly at 30 years for the first time.

Reasons for this phenomenon may be most diverse. For example, UK experts came to conclusion that in their country this is happening because of difference in living standards in northern and southern regions.

The more important education and career are for women, at the older age she resolves to motherhood.

Similar pattern is observed not only between residents of different countries, but in one state.