11.How many weeks is the usual duration of a full-term pregnancy?

a.32–36 weeks

b.38–42 weeks

c.43–45 weeks

d.46–49 weeks

12.Gestation is generally divided into equal periods of how long?

a.4 weeks, called quarters

b.9 weeks, called quartiles

c.4 months, called semesters

d.3 months, called trimesters

13.Which of the following weight ranges typifies a healthy infant?

a.2 – 2.5 kg

b.2.5 – 3 kg

c.3 – 3.5 kg

d.3.5 – 4 kg

14.Which of these terms is given to the time period during which irreversible damage to the fetus may occur from specific events such as malnutrition or exposure to toxins?

a.first trimester

b.critical period

c.fertility period

d.conceptual period

15.Which of these is the name given to the human organism 2 to 8 weeks after fertilization and the stage at which the digestive system is formed?

a.fetus

b.embryo

c.zygote

d.mesoderm

16.Which of these is the term given to the developing infant from the eighth week after conception until birth?

a.fetus

b.ovum

c.zygote

d.embryo

17.Which of these is the stage of pregnancy at which an embryo shows a beating heart and a complete central nervous system?

a.8 weeks

b.12 weeks

c.20 weeks

d.29 weeks

18.During development of the fetus, which of these organs is/are the first to develop?

a.heart and lungs

b.liver and kidneys

c.gastrointestinal tract

d.central nervous system and brain

19.The neural tube forms the early parts of which of the following body parts?

a.umbilical cord

b.liver and pancreas

c.gastrointestinal tract

d.brain and spinal cord

20.Among the following, which is known to represent a significant risk factor for a pregnancy being affected by a neural tube defect?

a.maternal obesity

b.age at time of pregnancy

c.low socioeconomic status

d.exposure to a hot tub during pregnancy