A new study looked at more than 100,000 women and found that those who had been pregnant and breastfed had a lower risk of early menopause.
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Breastfeeding & Pregnancy Lower Risk of Early Menopause
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Pregnancy, Breastfeeding, and Early Menopause
Breastfeeding and pregnancy could lower risk of early menopause
How to Recognize the Signs of Pregnancy While Breastfeeding - WeHaveKids