MATERNAL-NEWBORN & PEDIATRIC NURSING
REVIEW
Comprehensive Exam & Clinical Rationales: Prenatal Development
(200 Questions)
Module 1: Gametogenesis, Fertilization, and Implantation
Q1. Which cellular process reduces the diploid number of chromosomes
in germ cells to haploid?
A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication
Correct Answer: Meiosis
Clinical Rationale: Meiosis is the specialized form of cell division
that reduces the chromosome number by half, producing haploid
gametes (sperm and oocytes). [Core Concept Ref: Prenatal Dev &
Fertilization, Q1]
Q2. Where does normal fertilization of the secondary oocyte typically
occur in the human female reproductive tract?
A. Infundibulum
B. Ampulla of the fallopian tube
C. Uterine cavity
D. Cervical os
Correct Answer: Ampulla of the fallopian tube
Clinical Rationale: Fertilization most commonly takes place in the
, ampulla, the widest and longest section of the fallopian tube, shortly
after ovulation. [Core Concept Ref: Prenatal Dev & Fertilization, Q2]
Q3. What is the term for the biological process by which the zona
pellucida hardens upon sperm penetration to prevent polyspermy?
A. Acrosome reaction
B. Cortical reaction
C. Capacitation
D. Decidualization
Correct Answer: Cortical reaction
Clinical Rationale: The cortical reaction involves exocytosis of
cortical granules from the oocyte, modifying the zona pellucida to
block polyspermy. [Core Concept Ref: Prenatal Dev & Fertilization,
Q3]
Q4. Before fertilization can occur, mammalian spermatozoa must
undergo biochemical changes in the female tract known as:
A. Spermiogenesis
B. Capacitation
C. Agglutination
D. Metamorphosis
Correct Answer: Capacitation
Clinical Rationale: Capacitation removes seminal plasma proteins
and cholesterol from the sperm head, destabilizing the acrosomal
membrane to enable the acrosome reaction. [Core Concept Ref:
Prenatal Dev & Fertilization, Q4]
,Q5. What is the name of the solid ball of 12 to 16 cells resulting from
repeated mitotic divisions of the zygote?
A. Blastocyst
B. Morula
C. Trophoblast
D. Gastrula
Correct Answer: Morula
Clinical Rationale: A morula is formed approximately 3 to 4 days
post-fertilization, resembling a mulberry-like solid sphere of
blastomeres. [Core Concept Ref: Prenatal Dev & Fertilization, Q5]
Q6. Which structure differentiates into the embryonic fetal membranes
and placenta?
A. Embryoblast
B. Trophoblast
C. Hypoblast
D. Epiblast
Correct Answer: Trophoblast
Clinical Rationale: The outer layer of cells of the blastocyst, the
trophoblast, gives rise to the placenta and extraembryonic
membranes. [Core Concept Ref: Prenatal Dev & Fertilization, Q6]
Q7. On approximately which day post-fertilization does blastocyst
implantation normally initiate in the endometrium?
A. Day 1 to 2
B. Day 3 to 4
C. Day 6 to 7
, D. Day 14
Correct Answer: Day 6 to 7
Clinical Rationale: Implantation begins around the 6th to 7th day
following fertilization as the blastocyst adheres to the uterine
endometrial wall. [Core Concept Ref: Prenatal Dev & Fertilization,
Q7]
Q8. What hormone is secreted by the syncytiotrophoblast to signal the
corpus luteum to continue progesterone production?
A. Estrogen
B. Progesterone
C. Human chorionic gonadotropin (hCG)
D. Human placental lactogen (hPL)
Correct Answer: Human chorionic gonadotropin (hCG)
Clinical Rationale: hCG maintains the corpus luteum in early
pregnancy, ensuring continuous progesterone production until the
placenta is fully functional. [Core Concept Ref: Prenatal Dev &
Fertilization, Q8]
Q9. During which phase of the menstrual cycle is the endometrium most
receptive for blastocyst implantation (the 'window of implantation')?
A. Proliferative phase
B. Menstrual phase
C. Secretory phase
D. Ischemic phase
Correct Answer: Secretory phase
Clinical Rationale: The secretory (luteal) phase, under the influence
REVIEW
Comprehensive Exam & Clinical Rationales: Prenatal Development
(200 Questions)
Module 1: Gametogenesis, Fertilization, and Implantation
Q1. Which cellular process reduces the diploid number of chromosomes
in germ cells to haploid?
A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication
Correct Answer: Meiosis
Clinical Rationale: Meiosis is the specialized form of cell division
that reduces the chromosome number by half, producing haploid
gametes (sperm and oocytes). [Core Concept Ref: Prenatal Dev &
Fertilization, Q1]
Q2. Where does normal fertilization of the secondary oocyte typically
occur in the human female reproductive tract?
A. Infundibulum
B. Ampulla of the fallopian tube
C. Uterine cavity
D. Cervical os
Correct Answer: Ampulla of the fallopian tube
Clinical Rationale: Fertilization most commonly takes place in the
, ampulla, the widest and longest section of the fallopian tube, shortly
after ovulation. [Core Concept Ref: Prenatal Dev & Fertilization, Q2]
Q3. What is the term for the biological process by which the zona
pellucida hardens upon sperm penetration to prevent polyspermy?
A. Acrosome reaction
B. Cortical reaction
C. Capacitation
D. Decidualization
Correct Answer: Cortical reaction
Clinical Rationale: The cortical reaction involves exocytosis of
cortical granules from the oocyte, modifying the zona pellucida to
block polyspermy. [Core Concept Ref: Prenatal Dev & Fertilization,
Q3]
Q4. Before fertilization can occur, mammalian spermatozoa must
undergo biochemical changes in the female tract known as:
A. Spermiogenesis
B. Capacitation
C. Agglutination
D. Metamorphosis
Correct Answer: Capacitation
Clinical Rationale: Capacitation removes seminal plasma proteins
and cholesterol from the sperm head, destabilizing the acrosomal
membrane to enable the acrosome reaction. [Core Concept Ref:
Prenatal Dev & Fertilization, Q4]
,Q5. What is the name of the solid ball of 12 to 16 cells resulting from
repeated mitotic divisions of the zygote?
A. Blastocyst
B. Morula
C. Trophoblast
D. Gastrula
Correct Answer: Morula
Clinical Rationale: A morula is formed approximately 3 to 4 days
post-fertilization, resembling a mulberry-like solid sphere of
blastomeres. [Core Concept Ref: Prenatal Dev & Fertilization, Q5]
Q6. Which structure differentiates into the embryonic fetal membranes
and placenta?
A. Embryoblast
B. Trophoblast
C. Hypoblast
D. Epiblast
Correct Answer: Trophoblast
Clinical Rationale: The outer layer of cells of the blastocyst, the
trophoblast, gives rise to the placenta and extraembryonic
membranes. [Core Concept Ref: Prenatal Dev & Fertilization, Q6]
Q7. On approximately which day post-fertilization does blastocyst
implantation normally initiate in the endometrium?
A. Day 1 to 2
B. Day 3 to 4
C. Day 6 to 7
, D. Day 14
Correct Answer: Day 6 to 7
Clinical Rationale: Implantation begins around the 6th to 7th day
following fertilization as the blastocyst adheres to the uterine
endometrial wall. [Core Concept Ref: Prenatal Dev & Fertilization,
Q7]
Q8. What hormone is secreted by the syncytiotrophoblast to signal the
corpus luteum to continue progesterone production?
A. Estrogen
B. Progesterone
C. Human chorionic gonadotropin (hCG)
D. Human placental lactogen (hPL)
Correct Answer: Human chorionic gonadotropin (hCG)
Clinical Rationale: hCG maintains the corpus luteum in early
pregnancy, ensuring continuous progesterone production until the
placenta is fully functional. [Core Concept Ref: Prenatal Dev &
Fertilization, Q8]
Q9. During which phase of the menstrual cycle is the endometrium most
receptive for blastocyst implantation (the 'window of implantation')?
A. Proliferative phase
B. Menstrual phase
C. Secretory phase
D. Ischemic phase
Correct Answer: Secretory phase
Clinical Rationale: The secretory (luteal) phase, under the influence
