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Flashcards in genital embryology Deck (16):
1

fates of the embryologic kidney

pronephros: degenerates
mesonephros: degenerates after 1st tri UNLESS testosterone induces it to stay, contains mesonephric ducts (fully canalized duct system)
metanephros: becomes ADULT kidney

2

paramesonephric (mullerian) duct develops into

female internal structures IN PRESENCE OF NOTHING (default pathway):
fallopian tubes
uterus
upper portion of vagina

3

lower vagina is derived from

urogenital sinus → sinovaginal bulbs → lower vagina

4

agenesis or hypoplasia of the mullerian ducts can cause

upper vaginal agenesis or atresia: congenital absence of vagina

5

abnormal sinovaginal bulbs (derived from urogenital sinus) can cause

lower vagina agenesis or atresia

6

mesonephric (wolffian) duct develops into

male internal structures IN PRESENCE OF TESTOSTERONE:
SEED (no prostate):
Seminal vesicles
Epididymis
Ejaculatory ducts
Ductus deferens

7

incomplete fusion of paramesonephric ducts or complete failure of fusion can cause

partial or complete bicornuate uterus (double uterus + vagina)
recurrent miscarriages

8

meatus of penile urethra opens on inferior (ventral) side due to failure of of urethral folds to close

hypospadias
more common

9

meatus of penile urethra opens on superior (dorsal) side due to faulty positioning of gential tubercle

epispadias
more severe - associated with exstrophy of bladder

10

exstrophy of bladder

Epispadias = Extrophy

11

congenital gap in anterior bladder wall + abdominal wall in front of it → exposure of bladder interior to outside wall

exstrophy of bladder

12

embryologic structure that aids in descent of testes through inguinal canal → scrotum

gubernaculum

13

female remnant of gubernaculum

ovarian ligament
round ligament (anchors uterus fundus to labia majora)

14

male remnant of gubernaculum

anchors testes within scrotum

15

male remnant of processus vaginalis (evagination of peritoneum)

tunica vaginalis - covers testes

16

female remnant of processus vaginalis

obliterated