Fluid resuscitation
Transfuse blood products (as needed)
Emergent OB/GYN consult
If unavailable consider C-section in ED
Consider minimum 6 hours observation even if<unk>  not identified, if mechanism is concerning
If unavailable consider C-section in ED
Placental abruption
The same abdominal pain differential as non-pregnant patients, plus:
Uterine rupture
Ectopic pregnancy
Vasa previa
First trimester abortion
Placenta previa
Complete abortion