'Placenta Previa\r'

'Placenta Previa High Risk pregnancy Placenta previa occurs when an embryo implants itself in the lower uterus and the development placenta thereby implants low in the uterus and covers the inwrought cervical os. The previa jakes be complete, which involves the placenta covering the inhering cervical os completely, or partial, which involves only a portion of the placenta covering the cervical os. The diagnosis is of placenta previa is ofttimes made in the second trimester by sonography testing and is monitored for placental migration away from the os which occurs with uterine growth.Placenta previa in the second trimester puts the client at hazard for developing vasa previa and thought to be a endpoint of inflammatory atrophic changes to the placenta. In the third trimester, placenta previa is the trail cause of painless discharge leading to hemorrhage. The bleeding occurs as the placental attachment is disrupted from change state of the area as the cervix and uterus ord er for labor. Due to the location of the placenta, the uterus is unable to bargain to stop the flow of blood from the vessels.When bleeding occurs, Thrombin is released and stimulates uterine contractions, which thereby disrupt the placental attachment from the uterus even more, causing increased bleeding and can eventually lead to hemorrhage (Joy, 2012). The incidence of placenta previa is in approximately one in 200 pregnancies, has a mortality rate of 0. 03%. Common risk factors allow previous placenta previa, previous cesarean births, suction curettement for miscarriage, carrying more than one baby, delivery of six or more pregnancies, and tobacco or substance iniquity (Perry, Hockenberry, Lowdermilk, & deoxyadenosine monophosphate; Wilson, 2010).For first time pregnancies, placenta previa occurs in most 1 in 1,500 pregnancies but the risk for women who select had more than five pregnancies increases to about 5 in 100 pregnancies.References: J oy, S. M. (2012, June 5). Pla centa Previa. Retrieved September 29, 2012, from Medscape: emedicine. medscape. com/article/262063-overview#a0104 Perry, S. E. , Hockenberry, M. J. , Lowdermilk, D. L. , & Wilson, D. (2010). Maternal Child Nursing Care. Maryland Heights, MO: Elsevier.\r\n'