Lactation

1. Lactation has no effect on postmenopausal breast cancer in humans (HR 0.98, 95% CI: 0.94-1.03).

   Humansfemalesn = 6,880

   Associations Between Duration of Lactation and Maternal Risk of Obesity-Related Cancers-A Historical Birth Cohort Study · Maternal & child nutrition · 1 Jul 2026

Postmenopausal breast cancer →

1. Lactation has no effect on ovarian cancer in humans (HR 0.94, 95% CI: 0.82-1.09).

   Humansfemalesn = 6,880

   Associations Between Duration of Lactation and Maternal Risk of Obesity-Related Cancers-A Historical Birth Cohort Study · Maternal & child nutrition · 1 Jul 2026

Ovarian cancer →

1. Lactation has no effect on endometrial cancer in humans (HR 0.95, 95% CI: 0.84-1.08).

   Humansfemalesn = 6,880

   Associations Between Duration of Lactation and Maternal Risk of Obesity-Related Cancers-A Historical Birth Cohort Study · Maternal & child nutrition · 1 Jul 2026

Endometrial cancer →

1. Lactation has no effect on obesity-related cancer in humans (HR 1.00, 95% CI: 0.96-1.03).

   Humansfemalesn = 6,880

   Associations Between Duration of Lactation and Maternal Risk of Obesity-Related Cancers-A Historical Birth Cohort Study · Maternal & child nutrition · 1 Jul 2026

Obesity-related cancer →

1. Lactation lowers the risk of cardiovascular disease in humans.

   Review

   Lactation as a targeted intervention for hypertensive disorders in pregnancy: understanding the cardioprotective relationship · Expert review of cardiovascular therapy · 15 Sep 2026

Cardiovascular disease →