I would like to answer to Barb Cole: Breastfeeding women can either
     rely on LAM (if they meet the conditions required for efficacy of LAM)
     or use other methods to postpone their next pregnancy.  Non-hormonal
     methods have no influence on lactation and are the first choice.
     Progestogen-only methods do not influence the lactation and do not
     have effect on infant growth and development if started after 6 weeks
     postpartum. Combined pills have been shown to decrease milk output and
     total milk energy content, change milk constituencies and adversely
     affect the duration of lactation and infant growth.

     There are several good reference articles on contraception during
     breastfeeding. One of them is :

     "Diaz S, Croxatto HB, Contraception in lactating women, Current
     Opinion in Obstetrics and Gynecology 1993, 5:815-822."

     Two recent articles on progestogen-only methods that are based on a
     big  study that I coordinated in seven centres in five countries:

     "World Health Organization Task Force for Epidemiological Research on
     Reproductive Health; Special Programme of research, development and
     research Training in Human reproduction,
     Progestogen-only contraceptives during lactation : I. Infant growth,
     II . Infant development, Contraception 1994, 50: 35-53. 55-68."

     All these three articles have a list of further references.
     I hope they are helpful information for those prescribing
     contraceptive methods to breastfeeding mothers.

     Heli Bathija