What is the effect of a motor vehicle accident on a pregnant woman who was restrained properly?

The correct response identifies a higher risk for abruptio placenta following a motor vehicle accident, even in a properly restrained pregnant woman. Abruptio placenta, or placental abruption, is a serious condition where the placenta detaches from the uterine wall prematurely. This can lead to significant complications for both the mother and the fetus, including bleeding, loss of fetal oxygen supply, and potential threats to the pregnancy.

The nature of a motor vehicle accident, regardless of proper restraint, implies a considerable force that can impact the abdomen and may cause injury to the uterine tissues. The dynamics of the crash can lead to stress on the placenta, increasing the likelihood of it detaching from its normal position. Furthermore, the physiological changes in a pregnant woman, such as increased blood volume and vascularity of the placenta, can enhance vulnerability to such trauma.

In contrast, while proper restraint is certainly beneficial in reducing injury risks, it does not entirely negate the potential of severe outcomes associated with trauma during pregnancy. The other options do not accurately reflect the risks associated with motor vehicle accidents experienced by pregnant women. Hence, focusing on the increased risk for abruptio placenta provides an essential understanding of the potential consequences of trauma in pregnancy.