<unk>  is a condition in which fetal blood vessels cross or run near the internal opening of the uterus. These vessels are at risk of rupture when the supporting membranes rupture, as they are unsupported by the umbilical cord or placental tissue. Risk factors include low-lying placenta, in vitro fertilization.<unk>  occurs in about 0.6 per 1000 pregnancies. The term "vasa<unk> " is derived from the Latin; "vasa" means vessels and "previa" comes from "pre" meaning "before" and "via" meaning "way". In other words, vessels lie before the fetus in the birth canal and in the way.
Vasa praevia
Uremic fetor
Breus' mole
Aposthia
Arbor vitae 
Placenta praevia
Wandering womb
Abortion in Brunei