Prenatal care, labor complications, and common gynecologic presentations tested on USMLE Step 2 CK.
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- When should the first prenatal visit typically occur?
- During the first trimester, ideally by around 8 weeks gestation.
- What is Naegele's rule used to calculate?
- Estimated date of delivery: take the LMP, subtract 3 months, add 7 days (and 1 year if needed).
- Which method most accurately dates a pregnancy?
- First-trimester ultrasound (crown-rump length).
- What four analytes make up the second-trimester quad screen?
- AFP, hCG, estriol, and inhibin A.
- What is the screening test for gestational diabetes performed at 24 to 28 weeks?
- 1-hour 50g glucose challenge test.
- How is gestational diabetes diagnosed after an abnormal screening test?
- 3-hour 100g oral glucose tolerance test.
- When is Rh immune globulin (RhoGAM) given to an Rh-negative mother?
- At 28 weeks gestation, and again postpartum if the infant is Rh-positive.
- When is Group B Streptococcus (GBS) screening performed?
- At 35 to 37 weeks gestation.
- What antibiotic is first-line for intrapartum GBS prophylaxis?
- Penicillin G.
- Why is folic acid supplementation recommended before and during early pregnancy?
- To reduce the risk of fetal neural tube defects.
- When is the fetal anatomy (anomaly) ultrasound performed?
- 18 to 20 weeks gestation.
- When is nuchal translucency measured?
- 11 to 14 weeks gestation.
- During which weeks of pregnancy is Tdap vaccination recommended?
- 27 to 36 weeks gestation, in every pregnancy.
- Preeclampsia is diagnosed as new-onset ____ after 20 weeks gestation.
- hypertension and proteinuria
- What systolic/diastolic BP reading defines severe-range hypertension in preeclampsia?
- 160/110 mmHg or higher.