By Bianca Nieves, Mar 3, 2022

We reached out to  Kecia Gaither, MD, MPH, FACOG, double board-certified in OB/GYN and Maternal-Fetal Medicine, Director of Perinatal Services at NYC Health + Hospitals/Lincoln in the Bronx who further explained exactly how they are effective. “The uterus is a big muscle and uterine contractions during menses occur to expel the shed uterine lining. The contractions are sparked by chemicals called prostaglandin which is produced within the endometrium or uterine lining. When the endometrial cells degrade during menses, these chemicals are released. Heat allows the uterine muscle to relax, which helps with pain.” 

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