![Ultrasound Diagnosis.](images/po00265.jpg)
Ultrasound Diagnosis.
A-mode ultrasound examination of the uterus for the detection of fluid after 30 days of pregnancy.
Evans LE (2009)
![Ultrasound Unit.](images/po00268.jpg)
Ultrasound Unit.
B-mode ultrasound unit. B-mode real time ultrasound can often detect pregnancy as early as 18 days but reliability is better after 28 days.
Evans LE (2009)