Interpretation of antenatal biophysical testing non-stress tests and biophysical profiles may be subject to variation with gestational age as well.
Subchorionic hemorrhage occurs in approximately and is a common cause of vaginal bleeding in the first 20 weeks.
Fetal Anomaly Screening Programme: Programme handbook.
This type of ultrasound is conducted through the vagina instead of from outside which is how most ultrasounds are done.