The present invention relates to a composition comprising C-C motif chemokine ligand 2 (CCL2). More specifically, the present invention relates to a pharmaceutical composition and a food composition for promoting pregnancy containing CCL2 as an active component, to a pharmaceutical composition and a food composition for preventing or treating infertility containing CCL2 as an active component, and to a pharmaceutical composition and a food composition for preventing or treating inflammatory diseases containing CCL2 as an active component.
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