Population Research Institute
This site has a clear agenda and is deceptive in its articles. For example, in one article it referred to research being done on a method of birth control as "the effort to make millions of women allergic to their children" (http://www.pop.org/content/bad-blood-in-the-philippines-1200#endnote_anchor-1). This paints the effort for family planning as a conspiracy to forcefully control the population.
I find this website informative.