Cortisol production in fetal adrenal cortical cells (FACs) from control and LTH ovine fetuses as described in the Methods section. A) untreated basal, or treated with sodium nitroprusside (SNP, 1mM), NOS substrate (L-arginine (L-Arg), 2mM) or the NOS inhibitor L-NAME (1mM) B) treated with ACTH (10nM) or pre-treated with sodium nitroprusside (SNP, 1mM), NOS substrate (L-arginine, 2mM) or the NOS inhibitor L-NAME (1mM) followed by ACTH treatment as described in the Methods section. C) Cortisol data normalized to % change from ACTH treatment alone. (n=6 for control and n=7 for LTH). LTH indicates long-term hypoxia; L-NAME, nitro-L-arginine methyl ester; NOS, nitric oxide synthase; ACTH, adrenocorticotropic hormone.