During labor, a healthcare provider monitors the fetal heart rate (FHR) continuously to assess fetal well-being. The provider notes a FHR baseline of 140 beats per minute (bpm). As labor progresses, the FHR fluctuates, and the provider observes decelerations. The nurse understands that significant decelerations below 110 bpm may indicate fetal distress. An appropriate nursing intervention is to position the mother effectively to improve uteroplacental perfusion.
Please fill in the blank: The most optimal position for the mother during labor to ensure maximum blood flow to the placenta and reduce fetal distress is __________.