REPRODUCTIVE SYSTEM 01 Identify the genital ridge (5) in this 51/2 week embryo at the indifferent stage of gonadal development

REPRODUCTIVE SYSTEM 01

Identify the genital ridge (5) in this 51/2 week embryo at the indifferent stage of gonadal development.


This is the abdominal region from a 9 week old female fetus. Identify and describe the development of the following structures: bladder (2), genital tubercle (distal to #3), metanephros (4), suprarenal gland (9), ovary (6), rectum (7), round ligament of the uterus

(8), suspensory ligament of ovary (10), uterine tube (12), uterovaginal primordium (13).


Enlarged view of 9 week female pelvis showing rectum (7), ovary with primordial follicles (6), round ligament of

uterus (8), uterine tube (12) and uterovaginal primordium (13).


Identify and describe the development of the external genitalia in a 9 week female fetus: clitoris (3), labia majora (4), labia minora (5).


Identify and describe the development of the external genitalia in a 9 week old male fetus: anus (1), labioscrotal

swelling (3), urethral folds, urethral groove (7), phallus (5).


IDENTIFY the following in a ten week male fetus: labioscrotal swellings (2), genital folds (8), urethral groove (7),

glans penis (4), scrotal raphe (5), scrotum (6).


This dissection of a 13 week male shows the body of the penis (6), the urethral meatus (12), the scrotal raphe (8), and the scrotum (9).


Identify the following internal male organs: testes (7), bladder (2), rectum (5), ductus deferens.


Explain embryological basis of hematocolpos


Explain embryological basis for double uterus. Why is one side enlarged?


Explain the embryological basis for double cervix.


Explain the embryological basis for double vagina.


What is a possible explanation for this condition known as micropenis?


Recognize and describe the most likely cause of cryptorchidism.


Identify a unilateral indirect hernia.


Recognize and describe the embryological basis for hypospadias.


This four year old genetic male is an example of 21-hydroxylase deficiency. Explain the hormonal basis for this

abnormality. (Review hormonal products of suprarenal gland and estrogen precursor dihydroepiandrosterone).


Contrast the result of 21-hydroxylase deficiency in a genetic female with the same condition in the male.


This is an example of ANDROGEN INSENSITIVITY SYNDROME. This individual is a genetic male with an absence of testosterone receptors on the normally responsive tissue. The abdominal scar is from bilateral

orchidectomy.


This is the external genitalia of a male with testicular feminization. Note the oversized clitoris, labia majora fused

posteriorly and rudimentary vagina. The labia minora can also be identified.

Guess What Mom?

My professorwas a clown!

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REPRODUCTIVE SYSTEM 01 Identify the genital ridge (5) in this 51/2 week embryo at the indifferent stage of gonadal development