Why do people in famine stricken countries continue to have babies?

I love children and understand the deep desire to have children like most women, but I have never understood why couples in extremely poor, starving countries keep having sex/babies, especially when they already have other children that are starving too. I might understand it if a country was doing well, someone had a child and then some unforeseen disaster happened and suddenly the country is in a famine. But I don't understand how anyone could even risk the chance of bringing a new baby into a world when they live in a starving country to begin with. I have heard some say, "oh they have so many kids because there is such a high mortality rate and that way maybe one will survive". That is insane, part of the reason for the famine is because there are so many people to begin with. I've just never been able to wrap my head around this whole hideous concept. I understand there will be some cases of rape or a women being forced to have sex with her husband even if she doesn't want to risk a pregnancy, but I don't think this is true in all the cases of pregnant women in starving countries. I would literally kill a man if he tried to force me to have sex, knowing that if I got pregnant, my baby would almost certainly die of starvation.Shed some light for me please. In the meanwhile I will keep praying for God to bless and protect and provide for all of his precious children everywhere.