Decidua/metabolism; Gene-Environment Interaction; Premature Birth/prevention & control; 20-Hydroxysteroid Dehydrogenases/metabolism; Animals; Celecoxib; Cyclooxygenase 2/genetics; Cyclooxygenase 2/metabolism; Cyclooxygenase 2 Inhibitors/pharmacology; Cytokines/metabolism; Decidua/drug effects; Decidua/immunology; Drug Therapy, Combination; Female; Gene Expression; Glycoproteins/metabolism; Intercellular Signaling Peptides and Proteins; Lipopolysaccharides/pharmacology; Mechanistic Target of Rapamycin Complex 1; Mice; Mice, Transgenic; Multiprotein Complexes/antagonists & inhibitors; Multiprotein Complexes/metabolism; Ovary/drug effects; Ovary/immunology; Ovary/pathology; Pregnancy; Premature Birth/genetics; Premature Birth/immunology; Progesterone/pharmacology; Pyrazoles/pharmacology; Receptors, Prolactin/metabolism; Signal Transduction; Sirolimus/pharmacology; Sulfonamides/pharmacology; TOR Serine-Threonine Kinases/antagonists & inhibitors; TOR Serine-Threonine Kinases/metabolism; Tumor Suppressor Protein p53/deficiency; Tumor Suppressor Protein p53/genetics