Women with a multi ple ... complications such as anemia , eclampsia , and placenta l abruption. include: failure to progress, ... (baby's too big for birth canal), placenta previa , ...Ectopic Pregnancy... egg into a fallopian tube ), abruptio placenta e ( placenta separates from the uterine wall), ... ... determine the number of fetus es and identify placenta l structures to diagnose an ectopic p