Jo: Here are a few references you could give AWHONN: Newcomb PA, Storer
BE, Longnecker MP, et al. Lactation and a reduced risk of premenopausal
breast cancer. N Engl J Med 1994;330:81-7. Yoo KY,ajima K, Kuroishi T,
et al. Independent protective effect of lactation against breast cancer:
a case-control study in Japan. Am J Epidemiol 1992;135:726-33. Layde
PM, Webster LA, Baughman AL, et al. The independent associations of
parity, age at first full term pregnancy, and duration of breastfeeding
with the risk of breast cancer. J Clin Epidemiol, 1989;42(10):963-73.
United Kingdom National Case-Control Study Group. Breastfeeding and risk
of breast cancer in young women. BMJ1993;307:17-20. Yang CP, Weiss NS,
Band PR, et al. History of lactation and breast cancer risk. Am J
Epidemiol 1993;138:1050-6. McTiernan A and Thomas DB. Evidence for a
protective effect of lactation on risk of breast cancer in young women.
Am J Epidemiol 1986;124(3):353-8. Ing R, Ho JHC, Petrakis NL.
Unilateral breast-feeding and breast cancer. The Lancet July 16,
1977:124-7. Hope this helps. Alicia. [log in to unmask]
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