Transcutaneous PO2 and cardiovascular observations in the sheep fetus following the reduction of uterine blood flow.

On 11 near term pregnant sheep the response of the fetal transcutaneous oxygen partial pressure (tcPO2) was compared with the alteration of the oxygen saturation (SO2) and the PO2 in the fetal aorta (FA), fetal heart rate (FHR) and fetal arterial blood pressure (FA BP) following the reduction of uterine blood flow (UBF). The FA SO2 changed 12.3 (SD 3.