No matter what pregnancy decision you decide on, you will still need an ultrasound to move forward. There are multiple abortion procedures that are performed based on how far along you are in your pregnancy.
The FDA shares that the medication abortion method can only be used 10 weeks or less since your last menstrual period began. If you are farther along, a surgical abortion would be your only abortion option. An ultrasound can determine the gestational age of the pregnancy.