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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «P»:

  1. Placebo-controlled Placebo-controlled
    Placebo-controlled: A term used to describe a method of research in which an inactive substance (a placebo) is given to one group of participants, while the treatment (usually a drug or vaccine) being tested is given to another group. The results obtained in the two groups are then compared to see i...
  2. Placenta Placenta
    Placenta: A temporary organ joining the mother and fetus, the placenta transfers oxygen and nutrients from the mother to the fetus, and permits the release of carbon dioxide and waste products from the fetus. It is roughly disk-shaped, and at full term measures about seven inches in diameter and...
  3. Placenta accreta Placenta accreta
    Placenta accreta: The abnormal adherence of the chorionic villi (vascular fingers of the chorion, a part of the placenta) to the myometrium (the muscle of the uterus), . Normally there is tissue intervening between the chorionic villi and the myometrium but in placenta accreta, these vascular proce...
  4. Placenta percreta Placenta percreta
    Placenta percreta: A placenta that invades the uterine wall. In placenta percreta, the vascular processes of the chorion (the chorionic villi), a fetal membrane that enters into the formation of the placenta, may invade the full thickness of the myometrium. This can cause an incomplete rupture o...
  5. Placenta praevia Placenta praevia
    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....
  6. Placenta previa Placenta previa
    Placenta previa: Location of the placenta in the lower part of the uterus (womb) so that the placenta partially or completely covers the cervix. ...
  7. Placenta, accessory Placenta, accessory
    Placenta, accessory: See: Accessory placenta....
  8. Placenta, low Placenta, low
    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....
  9. Placenta, succenturiate Placenta, succenturiate
    Placenta, succenturiate: 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....
  10. Placenta, supernumerary Placenta, supernumerary
    Placenta, supernumerary: A succenturiate or accessory placenta....
  11. Placental Placental
    Placental: Pertaining to the placenta, the organ joining the mother and fetus during pregnancy....
  12. Placental BMP Placental BMP
    Placental BMP: See: MIC-1....
  13. Placental bone morphogenetic protein Placental bone morphogenetic protein
    Placental bone morphogenetic protein: See: MIC-1....
  14. Placental chorioangioma Placental chorioangioma
    Placental chorioangioma: A benign vascular (blood vessel) tumor of the placenta (afterbirth). Large chorioangiomas cause complications including excess amniotic fluid (polyhydramnios), maternal and fetal clotting problems (coagulopathies), premature delivery, toxemia, fetal heart failure, and hydrop...
  15. Placental dystocia Placental dystocia
    Placental dystocia: Difficulty delivering the placenta (the afterbirth). Dystocia comes from the Greek "dys" meaning "difficult, painful, disordered, abnormal" + "tokos" meaning "birth."...