Chapter 14 - Female Reproductive System

Question 1

The indifferent embryo begins
phenotypic sexual differentiation during

(A) week 3 of development
(B) week 5 of development
(C) week 7 of development
(D) week 12 of development
(E) week 20 of development

Answer 1

C. Week 7 of development

The embryo during weeks 1–6 remains in an indifferent or undifferentiated stage. The
embryo begins phenotypic sexual differentiation during week 7.

Question 2

The indifferent embryo completes phenotypic
sexual differentiation during

(A) week 3 of development
(B) week 5 of development
(C) week 7 of development
(D) week 12 of development
(E) week 20 of development

Answer 2

E. Week 20 of development

By week 12, female and male characteristics can be recognized. By week 20, phenotypic
sexual differentiation is complete.

Question 3

After the sinovaginal bulbs have proliferated
and fused, they form a solid core of
endodermal cells called the

(A) vestibule of the vagina
(B) uterovaginal primordium
(C) urogenital sinus
(D) vaginal plate
(E) clitoris

Answer 3

D. Vaginal plate

The sinovaginal bulbs proliferate, fuse, and form the vaginal plate under the inductive
influence of the paramesonephric ducts. The vaginal plate then canalizes to form the inferior
two thirds of the vagina.

Question 4

A structure found within the adult female
pelvis formed from the gubernaculum is the

(A) broad ligament
(B) suspensory ligament of the ovary
(C) round ligament of the uterus
(D) medial umbilical ligament
(E) median umbilical ligament

Answer 4

C. Round ligament of the uterus

The round ligament of the uterus and the ovarian ligament both form from the
gubernaculum.

Question 5

The labia minora arise embryologically
from which of the following structures?

(A) Phallus
(B) Labioscrotal swellings
(C) Sinovaginal bulbs
(D) Urogenital folds
(E) Paramesonephric duct

Answer 5

D. Urogenital folds

In the female, the urogenital folds remain unfused and form the labia minora.

Question 6

The uterine tubes of the adult female are
derived embryologically from which of the
following?

(A) Mesonephric duct
(B) Mesonephric tubules
(C) Paramesonephric duct
(D) Paramesonephric tubules
(E) Uterovaginal primordium

Answer 6

C. Paramesonephric duct

The cranial portion of the paramesonephric ducts form the uterine tubes.