If I recall correctly pregnancy in the teen years leads to an increased risk
of breast cancer. Well, hmmmm could it be the non pregnant teens were not
breastfeeding because they didn't have a baby.
I believe the second part of this is there is an increase in breast cancer
for woman that have their first baby after 40. Look for this as the next
study " Woman breastfeeding their 1st baby in their 40's have a higher risk
of breast cancer."
Ruth Solomon

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