" One of the longest-running public health studies dates from the 1970s, when half of the families in a number of villages in Bangladesh were given contraceptives and the other half were not. Twenty years later, the mothers who took contraceptives were healthier. Their children were better nourished. Their families had more wealth. The women had higher wages. Their sons and daughters had more schooling.
The reasons are simple: When the women were able to time and space their pregnancies, they were more likely to advance their education, earn an income, raise healthy children, and have the time and money to give each child the food, care, and education needed to thrive. When children reach their potential, they don’t end up poor. This is how families and countries get out of poverty. In fact, no country in the last fifty years has emerged from poverty without expanding access to contraceptives. "

― Melinda French Gates , The Moment of Lift: How Empowering Women Changes the World