Introduction: HESA-A is an active natural compound with herbal and marine origin. It contains inorganic, organic and aqueous fractions, and has shown antioxidant, cytotoxic and anticancer effects. In this study, the teratogenic effects of HESA-A in mice have been evaluated. Methods: Several doses of HESA-A were administered orally to pregnant mice on days 6 to 14 of gestation. Various parameter...