UNITEK OB EXAM 1 [CH 3-5] ACTUAL EXAM Comprehensive Practice Questions with 100% Verified Answers 2026/2027 grade A+

UNITEK OB EXAM 1 [CH 3-5] ACTUAL EXAM
Comprehensive Practice Questions with 100%
Verified Answers 2026/2027 grade A+

EXAM OVERVIEW

Category Details


Total Questions 150 Practice Questions


Chapters
3-5 (Prenatal Development, Fetal Development, Anatomy & Physiology of Pregnancy)
Covered


Fetal Development, Placental Function, Amniotic Fluid, Maternal Adaptations, Prenatal Care, Signs
Content Areas
Pregnancy



SECTION 1: FETAL DEVELOPMENT & GENETICS

1. A nurse is caring for a client in the prenatal clinic who has a possible ectopic pregnancy at 8 weeks
of gestation. Which of the following findings should the nurse expect?

 A. Painless vaginal bleeding

 B. Hypertemesis gravidarum

 C. Pelvic pain

 D. Hypertension

Rationale: Ectopic pregnancy typically presents with pelvic pain and vaginal bleeding. The pain is often
unilateral and sharp. Pelvic pain is a key finding that should raise suspicion for ectopic pregnancy .



2. A nurse is reinforcing teaching with a client who is at 6 weeks of gestation. The client tells the nurse
that she smokes one pack of cigarettes per day. The nurse should instruct the client that her newborn
is at increased risk for which clinical manifestation?

 A. Macrosomia

 B. Respiratory distress syndrome

,  C. Low birth weight

 D. Premature rupture of membranes

Rationale: Maternal smoking during pregnancy is strongly associated with low birth weight due to
reduced oxygen and nutrient delivery to the fetus. Nicotine causes vasoconstriction of uterine and
placental vessels .

3. A couple just learned they are expecting their first child and are curious if they are having a boy or a
girl. At what point of development can the couple first expect to see the sex of their child on
ultrasound?

 A. 8 weeks gestational age

 B. 10 weeks gestational age

 C. 14 weeks gestational age

 D. 18 weeks gestational age

Rationale: The external genitalia begin to differentiate around 10 weeks of gestation. However, the sex
can typically be visualized by ultrasound between 16-20 weeks. The question refers to the earliest
developmental point when sex differentiation begins .



4. A woman who is at 25 weeks of pregnancy asks the nurse what her fetus looks like. What does the
nurse explain is one physical characteristic present in a 25-week-old fetus?

 A. Smooth, hairless skin

 B. Fully developed lungs

 C. Lanugo covering the body

 D. Open eyes with eyelashes

Rationale: At 25 weeks, the fetus is covered with fine, downy hair called lanugo. This hair helps the vernix
caseosa adhere to the skin and protects the fetus while in utero. The fetus also has wrinkled skin due to
lack of subcutaneous fat .



5. When preparing to teach a class about prenatal development, the nurse would include information
about folic acid supplementation. What is folic acid known to prevent?

 A. Down syndrome

 B. Gestational diabetes

 C. Neural tube defects

 D. Preeclampsia

,Rationale: Folic acid supplementation before conception and during early pregnancy significantly reduces
the incidence of neural tube defects such as spina bifida and anencephaly .



6. Each body cell contains how many chromosomes?

 A. 23 chromosomes

 B. 46 chromosomes (22 autosomes and 1 pair of sex chromosomes)

 C. 44 chromosomes

 D. 48 chromosomes

Rationale: Each somatic cell contains 46 chromosomes, which is the diploid number. This includes 22
pairs of autosomes and 1 pair of sex chromosomes (XX in females, XY in males) .



7. The process by which chromosomes are reduced to half, resulting in 23 chromosomes per cell, is
called:

 A. Mitosis

 B. Meiosis

 C. Fertilization

 D. Cleavage

Rationale: Meiosis is the process of cell division that reduces the chromosome number from diploid (46)
to haploid (23). This occurs in the formation of gametes (ova and sperm) .



8. Fertilization normally occurs in which location?

 A. The uterus

 B. The cervix

 C. The outer third of the fallopian tube, near the ovary

 D. The ovary

Rationale: Fertilization typically occurs in the outer third of the fallopian tube (ampulla), near the ovary.
The sperm travels through the cervix, uterus, and into the fallopian tube, where it meets the ovum .



9. Sperm can pass through the cervix and uterus and into the fallopian tube within what time frame?

 A. 1 minute

,  B. 5 minutes

 C. 15 minutes

 D. 30 minutes

Rationale: Sperm can travel from the cervix through the uterus and into the fallopian tube within
approximately 5 minutes due to flagellar activity .



10. The ovum always contributes which chromosome?

 A. Y chromosome

 B. X chromosome

 C. Both X and Y

 D. Either X or Y

Rationale: The ovum always contains an X chromosome. The sperm can carry either an X or a Y
chromosome, which determines the sex of the fetus. If the sperm contributes X, the fetus is female (XX); if
it contributes Y, the fetus is male (XY) .



11. What is the term for the zygote entering the uterus on the 3rd day and floating for 2-4 days?

 A. Blastocyst

 B. Morula

 C. Trophoblast

 D. Embryo

Rationale: The morula is a solid ball of cells that enters the uterus on approximately the 3rd day after
fertilization. It floats for 2-4 days before forming a cavity and becoming a blastocyst .



12. The inner layer of the morula that eventually forms the embryo is called the:

 A. Trophoblast

 B. Blastocyst

 C. Decidua

 D. Chorion

Rationale: The morula forms a cavity with two layers. The inner layer is the blastocyst, which will develop
into the embryo. The outer layer is the trophoblast, which becomes the chorion .