The researchers used this data to calculate the mean duration of breastfeeding per child and cumulative
lifetime duration of any breastfeeding for all children.
Additionally, the U.S. Nurses» Health Study found only women with
a lifetime duration of breastfeeding of 2 years or more had a significantly lower risk of coronary heart disease than those who never breastfed.
The lack of or short
lifetime duration of breastfeeding typical of women in developed countries makes a major contribution to the high incidence of breast cancer in these countries.
It is estimated that the cumulative incidence of breast cancer in developed countries would be reduced by more than half, from 6.3 to 2.7 per 100 women by age 70, if women had the average number of births and
lifetime duration of breastfeeding that had been prevalent in developing countries until recently.
Not exact matches
Longer
duration of breastfeeding may or may not affect the appearance
of your breasts, but it will reduce the risk for breast cancer over your
lifetime, in addition to the many other health benefits to you and to your
breastfed baby.
This is one explanation for why developed countries, whose mothers
breastfeed for shorter
durations (or not at all) and have fewer children in their
lifetimes, have higher rates
of breast cancer among their populations.
A significantly reduced risk
of breast cancer was also found for those whose
lifetime duration of lactation totaled 73 - 108 months (odds ratio = 0.47, 95 % CI: 0.23, 0.95) and for those who
breastfed for > or = 109 months (odds ratio = 0.24, 95 % CI: 0.11, 0.53).