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The following have been identified as risk factors for placenta previa: Previous placenta previa (recurrence rate 4–8%), [13] caesarean delivery, [14] myomectomy [10] or endometrium damage caused by D&C. [13] Women who are younger than 20 are at higher risk and women older than 35 are at increasing risk as they get older.
There is no target treatment available for placental disease. Associative prevention mechanisms can be a method of minimising the risk of developing the disease, within early stages of pregnancy. Placental syndromes include pregnancy loss, fetal growth restriction, preeclampsia, preterm delivery, premature rupture of membranes, placental ...
Treatment may require blood transfusion or emergency hysterectomy. [2] Placental abruption occurs in about 1 in 200 pregnancies. [5] Along with placenta previa and uterine rupture it is one of the most common causes of vaginal bleeding in the later part of pregnancy. [6]
Treatment of this condition is very similar to treatment of non-gravid heart failure patients, however, safety of the fetus must be prioritized. For example, for anticoagulation due to increased risk for thromboembolism, low molecular weight heparin which is safe for use during pregnancy is used instead of warfarin which crosses the placenta.
Besides placenta previa and placental abruption, uterine rupture can occur, which is a very serious condition leading to internal or external bleeding. Bleeding from the fetus is rare, but may occur with two conditions called vasa previa and velamentous umbilical cord insertion where the fetal blood vessels lie near the placental insertion site unprotected by Wharton's jelly of the cord. [11]
Risk factors include pulling on the umbilical cord or pushing on the top of the uterus before the placenta has detached. [1] Other risk factors include uterine atony, placenta previa, and connective tissue disorders. [1] Diagnosis is by seeing the inside of the uterus either in or coming out of the vagina. [2] [6]
Patients can have pain secondary to uterine contractions, uterine tetany or localized uterine tenderness. Signs can also be due to abruptio placentae including uterine hypertonus, fetal distress, fetal death, and rarely, hypovolemic shock (shock secondary to severe blood loss). The uterus may adopt a bluish/purplish, mottled appearance due to ...
Placental abruption causes blood loss from the mother and loss of oxygen and nutrients to the placenta occasionally leading to preterm labour. [14] Other causes of placental abruption can be abdominal trauma or sudden decompression of amniotic fluid , however it is not uncommon for the cause of placental abruption to be unknown.