OB/GYN Board Exam Review
(2025/2026)
How often does the fetal urinary bladder empty - correct answer ✔✔Every 30 to 45 mins
In the early stages of organogenesis, how many kidneys form? - correct answer ✔✔6
Where are the majority of pulmonary sequestrations found? - correct answer ✔✔In the lower
left lung base
A velamentous cord insertion is associated with - correct answer ✔✔IUGR
The femoral epiphyseal plates are visualized sonographically after - correct answer ✔✔33 weeks
Methotrexate - correct answer ✔✔A folic acid antagonist. It inhibits DNA synthesis and kills
rapidity dividing trophoblastic cells. This drug can be used as a medical treatment for ectopic
pregnancy. The ectopic should not be ruptured and serum HCG should be less than 5,000
mIU/mL. And Ectopic sac should be less than 3.5cm
What is the single most sensitive indicator for IUGR - correct answer ✔✔AC
The gold standard for predicting fetal lung maturity is - correct answer ✔✔Lethicin-
sphingomyelin (L/S) ratio
The "banana sign" of the fetal cranium in diagnosing spina bifida refers to - correct answer
✔✔The appearance of the cerebellum in the presence of a spinal defect
, If the cephalic index is <75 , it is an indication of what condition? - correct answer
✔✔Dolichocephaly
What is the primary cause of death in posterior urethral valve (PUV) outlet syndrome? - correct
answer ✔✔Pulmonary hypoplasia
The fetus begins to produce urine at what gestational age - correct answer ✔✔12 weeks
The herniation of bowel into the umbilical cord is complete by - correct answer ✔✔10 weeks
Nagele's Rule - correct answer ✔✔Identify LMP
Add 7 days
Subtract 3 months
Add one year
In the third trimester, the fetal lung is - correct answer ✔✔Greater echogenicity than the liver
Agenesis of the corpus callosum cannot be diagnosed by ultrasound before - correct answer
✔✔18 weeks
Trisomy 21 is associated with - correct answer ✔✔Decreased AFP
Increased HCG
An increasing S/D ratio of the umbilical cord is a sign of - correct answer ✔✔Vascular resistance
within the placenta, which leads to a decrease in oxygen to fetus
The most common chromosomal abnormality associated with holoprosencephaly is - correct
answer ✔✔Trisomy 13
(2025/2026)
How often does the fetal urinary bladder empty - correct answer ✔✔Every 30 to 45 mins
In the early stages of organogenesis, how many kidneys form? - correct answer ✔✔6
Where are the majority of pulmonary sequestrations found? - correct answer ✔✔In the lower
left lung base
A velamentous cord insertion is associated with - correct answer ✔✔IUGR
The femoral epiphyseal plates are visualized sonographically after - correct answer ✔✔33 weeks
Methotrexate - correct answer ✔✔A folic acid antagonist. It inhibits DNA synthesis and kills
rapidity dividing trophoblastic cells. This drug can be used as a medical treatment for ectopic
pregnancy. The ectopic should not be ruptured and serum HCG should be less than 5,000
mIU/mL. And Ectopic sac should be less than 3.5cm
What is the single most sensitive indicator for IUGR - correct answer ✔✔AC
The gold standard for predicting fetal lung maturity is - correct answer ✔✔Lethicin-
sphingomyelin (L/S) ratio
The "banana sign" of the fetal cranium in diagnosing spina bifida refers to - correct answer
✔✔The appearance of the cerebellum in the presence of a spinal defect
, If the cephalic index is <75 , it is an indication of what condition? - correct answer
✔✔Dolichocephaly
What is the primary cause of death in posterior urethral valve (PUV) outlet syndrome? - correct
answer ✔✔Pulmonary hypoplasia
The fetus begins to produce urine at what gestational age - correct answer ✔✔12 weeks
The herniation of bowel into the umbilical cord is complete by - correct answer ✔✔10 weeks
Nagele's Rule - correct answer ✔✔Identify LMP
Add 7 days
Subtract 3 months
Add one year
In the third trimester, the fetal lung is - correct answer ✔✔Greater echogenicity than the liver
Agenesis of the corpus callosum cannot be diagnosed by ultrasound before - correct answer
✔✔18 weeks
Trisomy 21 is associated with - correct answer ✔✔Decreased AFP
Increased HCG
An increasing S/D ratio of the umbilical cord is a sign of - correct answer ✔✔Vascular resistance
within the placenta, which leads to a decrease in oxygen to fetus
The most common chromosomal abnormality associated with holoprosencephaly is - correct
answer ✔✔Trisomy 13
