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NUR 4450 - OB - Final Exam Questions and
Answers
placenta previa Ans: Placenta is implanted in the lower uterine
segment occurring in the third trimester, so it may partially or
totally cover the internal cervical os or is close enough to the
cervix to cause bleeding when the cervix dilates or the lower
uterine segment effaces
placenta previa classification of complete Ans: placenta totally
covers the internal cervical os
placenta previa classification of marginal Ans: edge of the
placenta is 2.5 cm or closer to the internal cervical os
placenta previa classification of low-lying marginal Ans: when the
exact relationship of the placenta to the internal cervical os has
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not been determined or in the case of apparent placenta previa in
the second trimester
placenta previa incidence and etiology Ans: •1 in 200 term
pregnancies
•Risk factors: cesarean birth, advanced maternal age (>35-40 years
old), multiparity, history of prior suction curettage, smoking, living
at a higher altitude, race (Asians), male fetus, multiple gestation,
having it in previous pregnancies
•Can occur at less than 34, 36, 37 weeks of gestation
placenta previa clinical manifestations Ans: •Painless, bright red,
vaginal bleeding (during second and third trimester)
•May begin as spotting or profuse hemorrhage
•Soft, relaxed, non-tender uterus
•(Presenting part of the fetus is high, so inaccurate gestational age
in terms of fundal height, and abnormal fetal position)
•Normal heart rate
placenta previa diagnosis Ans: Ultrasound (transvaginal >
transabdominal) to see where the placenta is
© 2025 All rights reserved
NUR 4450 - OB - Final Exam Questions and
Answers
placenta previa Ans: Placenta is implanted in the lower uterine
segment occurring in the third trimester, so it may partially or
totally cover the internal cervical os or is close enough to the
cervix to cause bleeding when the cervix dilates or the lower
uterine segment effaces
placenta previa classification of complete Ans: placenta totally
covers the internal cervical os
placenta previa classification of marginal Ans: edge of the
placenta is 2.5 cm or closer to the internal cervical os
placenta previa classification of low-lying marginal Ans: when the
exact relationship of the placenta to the internal cervical os has
© 2025 All rights reserved
, 2 | Page
not been determined or in the case of apparent placenta previa in
the second trimester
placenta previa incidence and etiology Ans: •1 in 200 term
pregnancies
•Risk factors: cesarean birth, advanced maternal age (>35-40 years
old), multiparity, history of prior suction curettage, smoking, living
at a higher altitude, race (Asians), male fetus, multiple gestation,
having it in previous pregnancies
•Can occur at less than 34, 36, 37 weeks of gestation
placenta previa clinical manifestations Ans: •Painless, bright red,
vaginal bleeding (during second and third trimester)
•May begin as spotting or profuse hemorrhage
•Soft, relaxed, non-tender uterus
•(Presenting part of the fetus is high, so inaccurate gestational age
in terms of fundal height, and abnormal fetal position)
•Normal heart rate
placenta previa diagnosis Ans: Ultrasound (transvaginal >
transabdominal) to see where the placenta is
© 2025 All rights reserved
