Sonography is critical to the current management of pregnancy loss. It is used to
predict and/or confirm viability. Knowledge of the early embryology as well as the
timing of these events is important to appropriate management. Sonographic parameters
can be divided into hard and soft signs. Hard signs include the absence of visible
heart motion or embryonic poles at certain cutoffs. The soft signs are generally related
to findings more likely to be associated with poor outcomes. Ultrasound is now also
used to help determine which patients may not require surgical intervention.
Ultrasound - miscarriage - threatened abortion - embryonic demise - first trimester