Embryology

Question 1

Cause of didelphus

Answer 1

Failure of fusion of Müllerian ducts

Question 2

Cause of unicornuate uterus

Answer 2

Unilateral hypoplasia or agenesis

Question 3

Cause of bicornuate uterus

Answer 3

Failure of fusion of Müllerian ducts

Question 4

Septate uterus cause

Answer 4

Non-reabsorption of midline septum

Question 5

Embryological development of tubes

Answer 5

Cranial unfused parts of the Müllerian ducts

Question 6

Embryological development of uterus, cervix, and upper vagina

Answer 6

Caudal ends of Müllerian ducts fuse medially to become the uterovaginal primordium

Question 7

Embryological development of lower vagina

Answer 7

Formed from the urogenital folds
Sinus tubercle forms the sinovaginal bulbs which fuse to form the vaginal plate
Vaginal plate canalises in the third trimester to form a continuous vaginal canal

Question 8

Female embroological differentiation

Answer 8

SRY gene absent (on Y chromosome)
No AMH stimulation
This results in regression of wolffian ducts and differentiation of Müllerian ducts