"It is seen extremely rarely, with an estimated incidence of 1 in 10,000–100,000 pregnancies 5."
"Breus mole (massive subchorionic haemorrhage)"
"Exaggerated signs and symptoms of pregnancy may be evident. The uterus is larger than the period of gestation and has abnormally high levels of beta-hCG. Clinical presentations include vaginal bleeding, preeclampsia and excessive vomiting."