Keywords: APAP; acetaminophen; gd; gestational day; GSH; glutathione; OVA; ovalbumin; BAL; Bronchoalveolar lavage; HSCs; hematopoietic stem cells; ALT; alanine aminotransferase; PAS; periodic acid-Schiff reagent; AHR; airway hyper-responsiveness; Hepatotoxicity; Pr