Afterpains are contractions in the uterus that occur during breastfeeding. This is due to a surge of oxytocin, which causes the uterus to contract.   These may range from period-like cramps to strong labor-like contractions and can be more severe with second and subsequent babies.

Lactation. (2016, August 6). In Wikipedia, The Free Encyclopedia. Retrieved 18:58, August 6, 2016, from

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