Mexico is reaching a demographic transition, where families tend to be smaller. Nowadays most families in Mexico are composed by both parents and one up to three children.
Most families consist of 2 parents and 1-2-3 children.
During the 40's-50's-60's most families had more children, let's say 4 children is a nice average for most families.
But if you go back in...
Current fertility per woman in Mexico is about 2.29 children born/woman. This means most families have two or three children per couple. However, Mexican extended families tend to live together under...