NFP (Natural Family Planning), which consists of not having sex during the woman's most fertile period, is most suited for couples where both partners can exercise self-discipline and engage in long-term planning. Does that characterize the majority of the population of Haiti?
I believe that the name which practitioners of NFP in Haiti will be called is "Parents."
I very much doubt that Haitians can exhibit self control when it comes to sex. The fact that there are nine million of them on that tiny Island argues against it.
Similarly, higher motivation is associated with consistent compliance for the contraceptive methods (rubbers, foams). Without conscientious use, all of these methods fail.
At the extreme end, if a woman is so powerless in the relationship that she can't get her husband to delay intercourse for a couple of days, she doesn't have the negotiating power to insist on a condom, either. Experience shows that NFP tends to increase women's sexual authority and the respect she gets from her husband. It builds their sense of shared responsibility in their relationship.
Contraceptives do the opposite. They obliterate mutuality. They erase the man's sense of responsibility.
Plus, if the couple lack the mutual cooperation, self-discipline, and long-term planning to even want (let alone achieve) control over their fertility, then all that’s left is essentially a veterinary approach: coercive spaying/neutering or the equivalent.
This erases the central point, which is that we’re going for *human* well-being. If we see the very poor as both useless and feckless Untermenschen, Sanger and Hitler had the correct approach: segregate and sterilize. But I believe neither you nor I would go there. I think we’re both aiming at human dignity and well-being, not the Final Solution.