Placenta percreta
A condition in which the placenta invades the uterine wall. In placenta percreta, the vascular processes of the chorion (chorionic villi), a fetal membrane that enters into the formation of the placenta, can invade the full thickness of the myometrium. This can cause an incomplete rupture of the uterus. The chorionic villi can go right on through both the myometrium and the outside covering of the uterus (serosa), causing complete and catastrophic rupture of the uterus.
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- Placenta praevia
A placenta implanted near the outlet of the uterus, so that at the time of delivery the placenta precedes the baby. Placenta praevia can cause painless bleeding in the last third of pregnancy, and may be a reason for a C-section. Also known as low placenta.
- Placenta previa
A condition in which the placenta is implanted near the outlet of the uterus, so that at the time of delivery the placenta precedes the baby. Placenta previa can cause painless bleeding in the last trimester of pregnancy, and it may be a reason to perform a C-section. Also known as low ‘placenta.
- Placenta, accessory
A condition in which there is an extra placenta that is separate from the main placenta. Also known as a succenturiate or supernumerary placenta.
- Placenta, low
Location of the placenta in the lower part of the uterus (womb) so that the placenta partially or completely covers the cervix. Also known as a placenta previa.
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An extra placenta separate from the main placenta. In anatomy “succenturiate” means accessory to an organ. In this case, a succenturiate placenta is an accessory placenta.