Breastfeeding as a contraceptive method. Family Health International website. Available at: http://www.FHI.org/en/RH/Pubs/factsheets/breastfeeding.htm. Accessed November 6, 2008.
Breastfeeding–sex and birth control. University of Michigan Health System website. Available at: http://www.med.umich.edu/obgyn/smartmoms/newborn/breastfeeding/sex.htm. Accessed November 6, 2008.
Kennedy KI, Rivera R, McNeilly AS. Consensus statement on the use of breastfeeding as a family planning method. Contraception .1989;39:477-496.
Labbok MH. The lactational amenorrhea method (LAM): another choice for mothers. Breastfeeding Abstracts.1993;13:3-4.
Labbok MH, Stallings RY, Shah F, et al. Ovulation method use during breastfeeding: is there increased risk of unplanned pregnancy? Am J Obstet Gynecol.1991;165:2031-2036.
Nichols-Johnson V. The breastfeeding dyad and contraception. Breastfeeding Abstracts.2001;21:11-12.
O’Quinn J. Natural child spacing and breastfeeding. Leaven. 1998;34:128.
Trussel J. Contraceptive failure in the United States: an update. Studies in Family Planning.1990;21:52.