Obesity
Intestinal obstruction<unk> Ascites
Cirrhosis
Malignancy
Heart failure
Tuberculosis
Spontaneous bacterial peritonitis
Peritoneal dialysis-associated peritonitis
Distended bladder / Acute urinary retention
Constipation / fecal impaction
Large tumor(s) (e.g. ovarian, lymphoma)
Organomegaly
Cirrhosis
Malignancy
Heart failure
Tuberculosis
Ectopic<unk> Subchorionic hematoma
First Trimester Abortion
Complete Abortion
Incomplete Abortion
Inevitable Abortion
Missed Abortion
Septic abortion
Threatened Abortion
Gestational trophoblastic disease
Consider when<unk> induced hypertension is seen before 24 wks of gestation
Heterotopic<unk> Implantation bleeding
Molar<unk> Non-pregnancy related bleeding
Cervicitis
Fibroids
Implantation bleeding
Complete Abortion
Incomplete Abortion
Inevitable Abortion
Missed Abortion
Septic abortion
Threatened Abortion
Consider when<unk> induced hypertension is seen before 24 wks of gestation
Cervicitis
Fibroids
Implantation bleeding
The same abdominal pain differential as non-pregnant patients, plus:
Ectopic<unk> First trimester abortion
Complete abortion
Threatened abortion
Inevitable abortion
Incomplete abortion
Missed abortion
Septic abortion
Round ligament stretching
Incarcerated uterus
Malposition of the uterus
Complete abortion
Threatened abortion
Inevitable abortion
Incomplete abortion
Missed abortion
Septic abortion
Labor/Preterm labor
Placental abruption
Placenta previa
Vasa previa
Uterine rupture
Vaginal trauma
HELLP syndrome
Cholestasis of<unk> Chorioamnionitis
Incarcerated uterus
Acute fatty liver of<unk> Malposition of the uterus
Placenta accreta
Placenta increta
Placenta percreta
Hemorrhagic ovarian cyst
Fibroid degeneration or torsion
Ovarian torsion
Constipation
Amniotic fluid embolus
Chorioamnionitis
Acute fatty liver of<unk> Eclampsia
HELLP syndrome
Mastitis
Peripartum cardiomyopathy
Postpartum endometritis
Postpartum headache
Postpartum hemorrhage
Preeclampsia
Resuscitative hysterotomy
Retained products of conception
Uterine rupture
Pregnancy 
Obesity
Comorbid diseases in pregnancy
Intestinal obstruction
First trimester abortion
Pregnancy
Vaginal bleeding in pregnancy 
Ascites