Association of placenta previa with a history of prior deliveries

Abstract

Background: The term "placenta previa" refers to the placenta's full or partial covering of the cervix's internal opening. It increases the likelihood of postpartum hemorrhage and elevates the risk of morbidity and mortality in both the mother and the newborn. Due to the circumstances, a cesarean section must be performed to deliver the newborn safely. Placenta previa has an unidentified underlying etiology. However, there is a link between endometrial damage and uterine scarring. The following risk factors are associated with placenta previa: advanced maternal age, multiple pregnancies, smoking, cocaine use, prior suction, and curettage, assisted reproductive technologies, history of cesarean section(s), and prior placenta previa. Case reports: This report examines 3 cases of placenta previa. 31-year-old woman, 38 weeks pregnant with her second child after one vaginal birth, one miscarriage, and one spontaneous abortion. The patient was hospitalized in a planned manner for termination of pregnancy in case of placenta previa. A2 gestational diabetes was diagnosed during pregnancy. A placenta was observed on fetal ultrasound in the front wall, covering the internal os, II° of maturation. A newborn weighing 2540 g., Apgar 8-9 was born. Amioniotic fluid was clear; <500 ml. of blood were lost during c-section 33-year-old woman, 36 weeks pregnant with her fourth child after two vaginal deliveries and 1c-section, two abortions, one miscarriage and two spontaneous abortion. The patient was hospitalized due to the appearance of blood flow from the genitals and uterine contractions. Transvaginal ultrasound revealed 36 mm cervix, no amniotic fluid has been discharged. A newborn weighing 3045 g., Apgar 7-8, was born. Bloody amniotic fluid was observed. Placenta was in the front wall. 1000-1500 ml. of blood was lost during the c-section. A histological examination of the placenta revealed a typical placental structure. 30-year-old woman, 37 weeks pregnant with her third child after two c-sections and one spontaneous abortion. The patient was hospitalized in a planned manner for termination of pregnancy in case of placenta previa, 2 prior c-sections and suspected high fetal weight. According to anamnesis, a patient has primary arterial hypertension and gestational diabetes type A2. A newborn weighing 3495 g., Apgar 10-10 was born. Amioniotic fluid was clear. 500-1000 ml. of blood was lost during the c-section. Conclusion: As the literature shows and our cases emphasize, cesarean birth is associated with increased risks of placenta previa for subsequent pregnancies. The risk of placenta previa is also affected by a variety of other circumstances, which allows for it to develop after a prior vaginal deliver.