ATI OB Exit Exam (Top 2024/2025 EXAM REVIEW DOC )

ATI OB Exit Exam The normal gestational sac grows at the approximate rate of a. 1 mm per day b. 2 mm per day c. 1.5 cm per week d. 2.5 cm per week - a. 1mm per day In late gestation, the hypoechoic contents of the fetal colon typically represent a. normal muscle of the bowel b. meconium c. a distal obstruction, such as anal atresia d. an inflammatory reaction to bowel perforation - b. meconium pertcutaneous umbilical blood sampling (PUBS) is performed under ultrasound guidance for which of the following reasons? a. to transfer a severely anemic fetus b. to provide nutrition for a severely growth restricted fetus c. in cases where determination of fetal-maternal blood incompatibility is necessary d. more than one of the above e. none of the above - d. more than one of the above A specific clinical indication of premature rupture of membranes is a. AFI 5.0 cm b. Passage of a large amount of watery fluid c. Small for gestational age d. None of the above - b. passage of a large amount of watery fluid The corpus luteum cyst of pregnancy is maintained throughout the first trimester by what process? a. production of leutinizing hormone by the anterior pituitary b. production of hCG by the trophoblastic cells c. growth of the amnion d. differentiation of the embryonic disk - b. production of hCG by the trophoblastic cells A crown length measurement of 16mm corresponds to what gestational age? a. 7.6 weeks b. 58 days c. Both a and b d. Neither a nor b - c. both a and b A thin, echogenic circular structure is seen surrounding the embryo, separate from the secondary yolk sac. What does this represents? a. primary yolk sac b. chorionic membrane c. amniotic membrane d. deciduas capsularis - c. amniotic membrane A pregnant patient presents with cramping and heavy vaginal bleeding that has persisted for over 5 days. What is the most likely explanation? a. threatened abortion b. incomplete spontaneous abortion c. inevitable spontaneous abortion d. symptoms are non-specific - b. incomplete spontaneous abortion twiin-twin transfusion syndrome is a serious complication for a twin gestation. Which of the following is not true about this condition? a. it occurs only with monozygotic twinning b. the donor twin may be "stuck" in an oligohydramnios sac, while the recipient twin may exhibit signs of hydrops c. there is a vascular anastomosis in the shared placenta that shunts blood away from one fetus to the other d. both fetuses grow concordantly throughout the course of gestation. - d. both fetuses grow concordantly throughout the course of gestation.