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Pineapple is said to induce labor as well. Pineapple, as well as papaya and mango, contain a proteolytic enzyme called bromelain. When bromelain is consumed with meals, it assists in the digestion of proteins. When taken on an empty stomach, bromelain acts medicinally as an anti-inflammatory agent. Therefore, naturopathic medicine uses this enzyme to reduce pain and swelling.
The mechanism by which pineapple contributes to inducing labor might be the proteolytic action of bromelain. Bromelain might help to soften the connective tissue of the cervix and, thus, bring on labor. Because bromelain is destroyed in the production process of canned pineapple, you should consume only fresh pineapple flesh if you are trying to induce labor with pineapple.