These guidelines cover modern methods of contraception. In step with contemporary thinking, modern methods of contraception are described as methods which use a product or medical procedure that interferes with reproduction from acts of sexual intercourse. Non-modern methods, also known as traditional or natural methods, are generally less reliable and effective than modern methods. In light of the high rates of unintended pregnancies, unmet need for contraception, and HIV prevalence in South Africa, these methods are not actively promoted in the National Clinical Contraception Guidelines.