PLACENTAL ABRUPTION:
(1) per vaginal bleed brownish
constant frequent short lasting contractions
OR
(1)hard tense contracting uterus (usually with concealed abruption)
(2)maternal compromise
(3) fetal compromise
R/F: HTM, trauma

PLACENTA PRAEVIA:
per vaginal bleeding fresh, bright red
maternal compromise
R/F: previous praevia,
previous C-section

UTERINE RUPTURE:
tenderness on site of previous scar
fetal parts palpable
R/F: previous C-section

AMNIOTIC FLUID EMBOLISM:
ACUTE onset of respiratory depression, CVS depression and hypotension, convulsions and altered mental status
R/F: anything that causes a breech in the normal placental barrier
MCC: Multiple gestation
Mx: resucitate in ICU with hemodynamic stability, manage DIC, delivery by C-section within 5 mins of cardiac arrest to resucitate mother!!!!