摘要: Two major protocols of non-randomized clinical trials the efficacy Lactational Amenorrhea Method contraception (LAM) were performed in 1990s that suggested LAM to be a highly effective albeit temporary method contraception. Data from longitudinal study over 4000 breastfeeding women by World Health Organization provide supporting information as LAM. Effectiveness data are scarce, is on use industrialized countries. Issues surrounding and effectiveness reviewed, existing countries highlighted.