Oh yes, because everyone can afford to use these things.
The US population is growing at a staggering 1.1%. This is because we have the birth control tools right at hand and affordable. Now let's go to a much lesser fortunate country such as India or Sudan. The reason they are having so many kids is not because they can't keep it in their pants, it is because they need a large family to suppourt their agriculturally based economies. Yes, it is true, there are other types of economies in the world that don't revolve around business and gasoline. I assure you the countries with large growth rates are those that are on farming economies.
Put yourself in their shoes. You own a farm. You need help to do all of the tasks owning a farm requires, but there's one problem. You can't hire anyone, because as it is you barely have enough to feed yourselves. You have more kids. You also need to have more kids because 1 out of 5 will die at birth and more even before the age of 8.
As you can see, it is not people's failure about birth control. It is the ignorance that we Americans project onto cultures that are stuck in a whirlpool of shit.