What are the social factors which drives the emigration of women between the ages of 22-40 from Mexico to the US over the last 30 years ?

What are the general causes and social impacts of migration of females between the ages of 22-40 from Mexico to the U.S ? Objectives: 2. What are the social factors which drives the emigration of women between the ages of 22-40 from Mexico to the US over the last 30 years ? 3. What are the social impacts of the emigration of women between the ages of 22-40 from Mexico to the US ? 4. What are the policies in place to address the problem of emigration of women between the ages of 22-40 from Mexico to the us ?