Embryology

Question 1

Klinefelter

• Genetics
• S/S
• LabDx

Answer 1

• G: XXY
• S/S: gynecomastia, small testes, eunechoid shape/hair;
• LabDx: + sex chromosomel + Barr Body

Question 2

Superfemale

• Genetics
• S/S
• LabDx

Answer 2

• G: XXX
• S/S: Mental Retardation; reduced fertility;
• LabDx: two Barr Bodies

Question 3

Turner Syndrome

• Genetics
• S/S:
• LabDx

Answer 3

• G: X0
• S/S: Webbed neck, short stature, Coarctation of Aorta, Horseshoe kidney, sexual infantism, short 4th metacarpal
• LabDx: Ne sex chrom/Barr Body

Question 4

Gonad Anatomy/Development

Answer 4

• initially indifferent + potential

- Cortex -> Ovary; Medulla -> testes

Question 5

Conditions for ovary development

Answer 5

f zygote has NO “Y”, and AT LEAST TWO “X” CHROMOSOMES, the gonad will differentiate into an ovary

Question 6

Importance of Ischial spine landmark?

Answer 6

• pudendal block

- reference point for “station”

Question 7

Pelvic planes

Answer 7

• Plane of inlet (S1)
• plane of greatest (S2/3)dimension
• plane of least pelvic dimension (S4/5)
• plane of outet (S5)

Question 8

Blood supply to Uterus

Answer 8

• Uterine artery via hypogastrics

- Ovarian via Aorta