Ectopic pregnancy
Molar pregnancy
Sepsis
Pulmonary embolism in pregnancy
Pelvic origin
Acute cystitis
Ectopic<unk>  torsion
Endometriosis
Pelvic inflammatory disease
Cervicitis
Ectopic pregnancy<unk>  torsion
Spontaneous abortion
Septic abortion
Myoma (degenerating)<unk>  cyst (rupture)
Tubo-ovarian abscess
Mittelschmerz
Sexual assault/trauma<unk> 
Vaginitis (e.g. trichomoniasis, candidiasis)
Urethritis (e.g. N. gonorrhoeae/Chlamydia)
Abdominal origin
Appendicitis
Kidney stone
Psoas abscess
Mesenteric adenitis
Incarcerated hernia
Diverticulitis
Pyelonephritis
Ovarian hyperstimulation syndrome
Ectopic pregnancy
Aconitum toxicity
Molar pregnancy
Ovarian torsion
Sepsis
Pulmonary embolism in pregnancy
Septic abortion