The expansion of the opening of the cervix in preparation for birth is referred to as ____.
a. cervical effacement c. contraction
b. dilation d. episiotomy
Question 2
According to one study, the lifetime prevalence of PTSD in the adult population in the United States is estimated to be _____.
A. 9.7
B. 6.8
C. 3.6
D. none of the above