Ultrasound is also used to determine the number of babies present. Right now the chance of having twins is 1 in 33.

The incidence of ectopic pregnancy is on the rise. This is when a pregnancy develops outside of the uterus, often in the fallopian tubes. If an ectopic pregnancy continues to grow in the fallopian tube, it can damage or burst the tube causing heavy bleeding, even possible death. This is a very serious condition that needs immediate attention.

The FDA recommends that an ultrasound be performed to determine if the pregnancy is located in the uterus before using the RU486 drug because the RU486 will have no effect on an ectopic pregnancy.