theca lutein ovarian cyst: large amount HCg stimulate internal theca cells (i).symptom (ii). disappearance: within 2-4 month after operation iv gestational vomitting and PIH (i).gestational vomitting ) PIH: when uterus is abnormally enlarged and HCG t v hyperthyroidism (i7% is complicated with slight hyperthyroidism incase:HCG↑↑,T3T4↑↑ vi abdominal pain: generally not severe, often before bleeding occurrence of acute abdomeniii.theca lutein ovarian cyst:large amount HCG stimulate internal theca cells…… (i).symptom (ii).disappearance:within 2~4 month after operation iv.gestational vomitting and PIH (i).gestational vomitting (ii).PIH:when uterus is abnormally enlarged and HCG↑↑ v.hyperthyroidism: (i)7% is complicated with slight hyperthyroidism (ii)cause:HCG ↑↑, T3T4 ↑↑ vi.abdominal pain:generally not severe,often before bleeding. occurrence of acute abdomen