Pawpaw seeds, Hibiscus flowers and neem tree could provide the much sought after safe, effective and affordable male contraceptive that can induce reversible infertility. IN recent times, conventional contraceptives have been in the news for the wrong reasons. Female contraceptives have been linked to stroke, cancer, and irreversible infertility, among others. Researchers are also struggling to produce a widely accepted conventional male contraceptive.   
However, natural product researchers have validated natural birth control methods for male and female to be safe and reversible.
India researchers have shown that pawpaw seeds extract induces long-term reversible infertility in male monkeys. Pawpaw or papaya is botanically called  carica papaya.