They get contraceptive shots before they come. The women come expecting to be raped.

I just watched a group of short films documenting what Central American migrants experience when crossing into Mexico.  Their ultimate goal is to immigrate to the United States.  The migrants must fear being robbed, beaten, raped, kidnapped, and/or murdered.  With all this said, sometimes their families back homes never learn what happened to them.  They will forever be know as "desaparcidos," the missing.

Gael Garcia Bernal and Marc Silver directed this group of films.  Garcia Bernal is very well known for his roles in Amores Perros, Motorcycle Diaries, and Rudo y Cursi.

Here is the link to the films. http://www.youtube.com/invisiblesfilms

(It would not allow me to embed them into the post.) Enjoy.

Below is the trailer.