Overall,<unk>  is a rare<unk> . Nevertheless, the incidence of<unk>  varies greatly between different parts of the world. The reported incidence of hydatidiform mole ranges from 23 to 1299 cases per 100,000 pregnancies. The incidence of the malignant forms of<unk>  is much lower, only about 10% of the incidence of hydatidiform mole. The reported incidence of<unk>  from Europe and North America is significantly lower than the reported incidence of<unk>  from Asia and South America. One proposed reason for this great geographical variation is differences in healthy diet in the different parts of the world (e.g., carotene deficiency). However, the incidence of rare<unk> s (such as<unk>  is difficult to measure, because epidemiologic data on rare<unk> s is limited. Not all cases will be reported, and some cases will not be recognised. In addition, in<unk> , this is especially difficult, because one would need to know all<unk>  events in the total population. Yet, it seems very likely that the estimated number of births that occur at home or outside of a hospital has been inflated in some reports.
Gestational trophoblastic disease
Forced pregnancy
Toxic abortion
Postpartum infections
Early pregnancy bleeding
After-birth abortion
Molar pregnancy
Puppy pregnancy syndrome