Concentrations of (A) TxB2 and (B) 6-keto PGF1α in uterine arteries from pregnant rats. Arteries were incubated in Krebs-Henseleit solution [(−) PVATmedia] or PVATmedia [(+) PVATmedia] in the presence of a nitric oxide synthase inhibitor (L-NAME). Values are mean ± SEM. Paired t-test. COX, cyclooxygenase; PVATmedia, PVATmedia, perivascular adipose tissue conditioned media; TxB2, thromboxane B2; 6-keto PGF1α, 6-keto prostaglandin F1α.