OB/GYN ARDMS Registry Review Exam 2025-2026 Guide, Exams of Nursing

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OB/GYN ARDMS Registry Review Exam 2025 - 2026 Guide

OB/GYN ARDMS Registry Review Exam 2025-2026 Guide The primitive hindbrain can be seen as a cystic structure with in the embryonic head? - CORRECTANGIER—Rhombencephalon The maternal side of the developing placenta is referred to as the? — CORRECT ANSWER —Decidua Basalis Up to 10 weeks gestational age. the mean diameter of the normal gestational sac should grow? — CORRECT ANSWER -1 mm/day Physicologic hernation of fetal intestines outside the abdomen should not be seen after what gestational age? — CORRECT ANSWER —12 weeks CRI. measures > 45mm The base of the umbilical cord should not exceed? — CORRECT ANSWER —7 mm One should be able to transabdominally image a gestational sac when the TRC level for hCG is = or >? Transvaginally? — GGRREGRANSIERI- 3600 units/liter 2000 units/liter Patient is 10 weeks by menstrual dates with pregnancy induced hypertension, You suspecl? - CORRECT ANSWER -Tly datiform Mole Almost always pathonomonic of a molar pregnancy in the 1st trimester? — CORRECT ANSWER —Preeclamsia Pregnant patient presents with bledding and cramping. What would be suspect of an inevitable abortion? — GORRECTANGSWER—Dilatcd corvi An ectopic with a normal TUP? — GORRPOTANGW i —Teleroectopic pregnancy To differentiate an carly TUP from a pscudogestational sac. it is helpful to visualize? — CORIEOMANSHER Yo: Sac A yolk sac is considered abnormal when il's diameter exceed? Shape? Appearance? — SORAESTENSWER- om Irregulary shaped Calcified What drug can be used to treat an carly unruptured ectopic pregnancy in order to - GORRECTMNGWEN — Methotrexate preserve fertility The most common position of a utcrus is? — GORRECTANGWER- Anteflexed Tn a ruptured extopic pregnancy, which section of the tube is most life threatening? — SORRNGMANGIGREIo:crsticuy Rupture is accompanicd by bleeding from the uterin arteries Why Hyperemesis gravidarum Large for gestational age All characteristics of? — GORREGTANSWER— Trophoblastic Discase Most reliable calculation for the ENC is? — CORRECT ANSWER —CRL Because of spinal segmentation, CRT. begins to loose accuracy after how many wecks? The structure that initially maintains a connection between the yolk sac and embryo once they diverge from cach other? Contains and artery and a vein, — CORRECTS WEN- Vitclinc Duct (omphalomesenteric duct) Thickening of the nuchal soft tissue during the 1st trimester and a strong corrolation for chromosomal defects? — GORRECTANGWER—Nuchal translucency A procedure preformed to treat and incompentent cervix, The most complicated, the suture is almost completely buried beneath the cervical mucosa? — CORRECT ANSWER —Shirodkar Procedure A procedure preformed to treat and incompentent cervix with a less invasive outcome using a purse string suture, — GORRECTANGIWEN - McDonald Procedure With this type of pregnancy, the most common symptom is pain? — CORRECT ANSWER] —Fetopic An ectopic pregnancy in this part of the tube is more life threatening? — CORRECT ANSWER —Interstital Normally, nuchal translucency doesn't exceed? — CORRECTANG Wa — 3mm This lics within the atria of the lateral ventricals bilaterally? — CORRECT ANSWER — Chorid Plexus Tn ruling out hydrocephalus, where would one 1st begin to see enlargement? — CORRECT ANSWER | Lateral Ventricular Atria The normal measurements for the lateral ventricla of the fetal brain are? - CORRECT ANSWERI-1em in largest dimension trar When the fetal spine is imaged transversly, the ultrasound demonstrates? — CORRECT ANSWER -3 ossidicalion centers (2 posterior pointing loward each other, 1 anterior) What US modality would you us to prove fetal life on a frozen image? — CORRECT ANGIE —10—mode The anatomic structure closest to the spine in a 4-—chamber heart view is? - SORRBGTANSIER 1 cit Atrium This occupies 1/3 of the chest cavily pointing toward the left side of the letus? — SORRBGENSWER Fetal Heart At what gestational age is the amniotic fluid yolume and fluid in the fetal bladder almost entirely due to lunctioning kidneys? — CORRECT ANSWER -1 2-13 weeks The fetal bladder should fill and empty approximatly every? — CORRECT ANSWER — 30-45 mins. The bladder of the male [elus is somelimes enlarged because of? Most common cause of male fetus bladder obstruction outlet? — CORRECT ANSWER —Posterior Urethral Valves Most common female bladder obstruction outlet? — CORRECTING —Clocal Malformation or Urethral Atresia What structures can be seen at the level of the bladder using a coronal view of the fetal pelvis on an OB exam? — CORRECT ANSWER ~liac Bones When you image the fetal stomach transverse at the level of the portal vien, you are at the right level for what measurement? — CORRECTANGWEN- Abdomenal Circumference What lab tests are performed to determine if a fetus has a neural tube defect or Down's syndrome? — CORRECTING WEN -MSAFP Triple Sereen CVS Amniocentesis This test can rule out Down's syndrome? — CORRECT ANSWER | Amniocentesis 2nd trimester OB US are better than 1st trimester in determining? — CORRECT ANSWER Fctal Anatomy Most favortable position of the baby for birth where the crown area of the head presen. Peal? — CORRECT ANSWER Vertes In sagittal midline view, if the cord is positioned near the cervical os, this is called? — SGRRRGENGWER — Vasa Previa Dr's usually don't consider a C-section due lo previa until what gestational week? — SGRRRGTENSWER-37 weeks Th placenta devclopes from the? - CORRECT ANG WE —Chorion and Decidua A thickened appearing cord is most likely from? — GORRBOTIANG WIN —Cxcessive Wharton's iclly This produces alpha-fetoprotein, provides nurishment for the fetus as well as protection? — —Functions of the placenta F sory placenta lobe is called? — CORRECT ANSWER | Succenturiate Placenta A placenta previa can be ruled out if the placental edge is at least how far from the internal cervical os? ~ GORRECTRANSIER) 2cm Cephalic Index below 70%. head shape that is long and narrow? — CORRECT ANSWER) —Dolichocephaly Cephalic Index above 85%, head shape that is abnormally short? — CORRECT ANSWER—Brachyceph aly Normal Cephalic Index range? — CORRECT ANSWER -70 to 85% The best method and time for estimating gestational age would be? — CORRECT ANSIWERI-crr. @ 10 weeks Cerebellar measurements can be used lo estimale geslalional age bul loose accuracy after? — GGRREGHANGIERI-30 weeks Epiphyseal centers will not be identified sonographically until after? — CORRECT ANSWIR-30 weeks BPD position calipers on outer edge of anterior skull and inner edge of posterior skull is termed? — CORRECTANG WENT cading Edge Fetal lung maturity is best delermined by? — GORRHSTANS WE — Amniocentesis One can caluclate a patient's duc date by adding 9 months + 7 days to the Ist day of is done according to? — CORRECTANGIEN —Nacgcle’s rule (approx, 280 days) last period, This Present in 1st trimester, softening of utern consistancy and possibility to palpate the connection between cervix and fundus? — GORRECTMANGIWER!—Hegar's sign Present in the 1st trimester, bluish discoloration of cervi agina and labia caused by the hormone estrogen causing yenous congestion? — CORRECT ANSWER — Chadwick's sign Absence of menstrual period? — CORRECT ANSWER. Amenorrhea When the mother start to fecl movement between 16 and 20 weeks? — CORRECT ANSWI-Quickening The size of the gestational sac should incr: se daily by? — SORREGTANSI ER - Imm (reliable up to 10 weeks) If no embryo is seen within a sac, one can roughly calculate the gestational age in weeks by measuring the mean sac diameter and adding to it? — CORRECT ANSWER ~2 Gestational sac measurements are accurale in eslimaling geslalional age to within how many weeks? — CORRECT ANSWER ~2 weeks ational age? — SORREGIIANS IER] - What anatomy can be measured to confirm ge Cerebellar length Binocular distance Renal length Humerus length Twin-to-twin transfusion syndrome is specific to gestation? — CORRECT ANSWER —Monozygotic gestations Monozygotic twins can be chorionic? — CORRECTANGWEN—Dichorionic Chorionicity is related to? - GGRREGHANSIFERI—Piacentation 100% of dizygotic twins are chorioni | twins devclope from the same zygote? — CORRECTANGWEN— Monozygotic Ident Fraternal twins devclope from 2 seperate zygotes and are fertil sperm? — GORRECIANSIIER) 1-1 oie Zod by 2 seperate Each twin has it's own chorionic and amnionic sac? — CORRECT ANSWER — Dichorionic These are determined by the timing of separation of the single zygote during pregnancy? — CORRECTS — Chorionicity and Amnionicity Anomaly associated with maternal DM and is an abnormal development of the lower spine? — CORRDOTANS Wi — Caudal Regression Syndrome Tf a patient's AFP level is low, one should check for? — CORRECT ANSWER — Trisomy 21 These measurements in the head are consistant throughout the pregnancy? — CORRECTENSWEN -Veotricutar A skull that is shaped like a clover leaf is most likely associated with? — CORRECT ANSWER Thanatrophoic dwarfism Characteristics of this are: narrow ches.,. small rib cage. enlarged head with large forehead and wide spaced eyes, still born or die shortly after birth from respratory failure? — CORRECT ANSWER — Thanatrophoic dwarfism You discover a rounded, uid filed midline structure withing the felal brain that shows color Doppler. This is most likely? — CORRECTANG WEN Vein of Galen Ancurysm This can lead to cardiac failure, hydrocephaly and subarachnoid hemorrhage in neonales? — CORRECTING ER Vein of Galen Aneursym These are associated with alobar holoprosencephal ~ CORRECT ANSWER —Clef: defect of the face Trisomy 13 Large monoventricle with fused thalami Usually fatal Which ratio is most sensitive for detecting asymetrical TUGR? — CORRECT ANSWER -EL/AC These are associated with? Neural tube defect, fails to close, absence of major portion of the brain, most do not Partial or complete absence of the top portion of the skull, incompatible with life? — SORRRCTENSWER A crania Neural tube defect, sac—like protrusionofl the brain and the membranes through openings in the skul? - CORRECTANGWER— Encephalocele Upper lip and roof of mouth do not come together? — CORRECT ANSWER —Clott Palate Large avities containing watery fluid (ymph fluid) on the neck areca. benign? — GORRECTANGIWER— Cystic Hygroma Encapsulated tumor with tissure or organ components, can contain teeth, hair and bones, can be benign or malignant? — GORRECTMNGIEN— Teratoma An abnormal X chromosomal in females which leaves them infertal because of the absents of ovarian function. Extra skin on the neck, heart defects, swelling in hands & feet, kidney problems? — SGRABGHENSWER—Torner's Syndrome Whal ralio lest is best for determining fetal lung maturity using amniotic Suid? — CORRESTANG WE ccithin/Sphingomyelin Ratio Refers to after delivery, a process that takes 6-8 weeks? — CORRECT ANSWER — Puerperium The postpartum uterus should revert back to pregravida size within how many weeks? A molar pregnancy associated wilh a viable fetus is called? — CORRECT ANSWER - Coexistent Mole and Live Fetus A benign tumor derived from glandular tissue. Can make a pregnant paticnt present large for gestational age? — CORRECT ANSWER | C tadenoma Germ cell tumors composed of multiple cell types derived from one or more of the 3 germ layers, Can make a pregnant paticnt present large for gestational age? — Benign fibroid tumor. Can make a pregnant paticnt present large for gestational age? — Rare and appear when cells in the womb start Lo grow out of control. Can make a pregnant patient present large for gestational age? — CORRECT ANSWER — Trophoblastic Discase Caused by multiple ovulations at the same Lime More common in blacks Higher incidence in women over 40 Considered fraternal — CORRPCTANGWEN- Dizygotic Twinning given within 72 hours of delivery or abortion. 5. RhoGam is also given at 28 weeks weetstion, ~ CORRRCT ANSWER — Rhesxom al vein is called? — CORRECT Packed red blood cells are introduced into the umbili ANSWER — Fetal Blood Intrauterin Transfusion The most common surgical procedure during pregnancy? - CORRECT ANSWER | Cr section Dialated renal pelvis and calyces? — CORRECTANGWEN—Pclvicalicctasis A molar pregnancy that is considered invasive bul does not metastasize is called? (relative harmless) — CORRECTING WEN —Choricadcnoma Destruens Surgical procedure where the cervix is sewn closed during pregnancy during 12-14 weeks. — CORREGIPANSIIA- Cerclaze A type of cerclage where a 5mm band of permanent suture is buried in the cervix. More invasive procedure? Delivery results in a C-section. — CORRECT ANSWER — Shirodkar procedure A type of cerclage where a permanent purse string suture is placed high on the Servix, loss invasive on the cervix. Delivery results in a C-section, ~ CORRECT — McDonald's procedure Postpartum period last for? — CORRECT ANSWER —6-§ weeks Uterine contractions after delivery? If uterus is unable to adequately contract, bleeding will persist. — GORRECTMANGIWERI—Utern Atony Large for gestational age? Fetal weight > 4500g — CORRECTANGWEN— Macrosomic Small for gestational age? Fetal weight <2500g — CORRECTANGWER—Microsomic Causes for postpartum hemorrage? — CORRPOTANS Wig — Multi geslalions Polyhydramnios Macrosomic Long labor Perinatal infections passed from mother to baby? Toxoplasmosis Other Rubella Cytomegalovirus Herpcs- 2 — SORREGHENSINER|- TORCH This can result in a thick, edematous placenta? — CORRECTING — Maternal Diabetes TORCH Non-immune hydrops This can result in a thick, edematous placenta?