Antenatal Steroids and the IUGR Fetus: Are Exposure and Physiological Effects on the Lung and Cardiovascular System the Same as in Normally Grown Fetuses?

Figure 7

Although blood pressure is the same in the normally grown and the IUGR fetus, the drop in blood pressure in response to an α adrenergic antagonist, phentolamine, is related to fetal arterial PO₂ in control (open circles) and PR (closed circles) fetal sheep (𝑦=0.87×−27.01, 𝑟²=0.78, 𝑃=0.003) [5, 131].