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Studies comparing estrogen alone with estrogen plus progestogen regimen. The estrogen plus progestogen regimen could significantly increased TC, LDL-C, HDL-C, and Lp(a) concentration compared with estrogen alone. (A) TC concentration; (B) LDL-C concentration; (C) TG concentration; (D) HDL-C concentration; (E) Lp(a) concentration.
