Question

which statement correctly describes the fetal development process?
○ the fetus undergoes the most rapid weight gain during the first trimester.
○ the fetus takes an average of 30 weeks to mature after conception.
○ fetal organ systems develop at a steady rate throughout pregnancy.
○ to ensure proper growth, a fertilized egg must implant in the wall of the uterus.

Explanation:

• Analyze Option 1: The most rapid weight gain for the fetus occurs in the third trimester, not the first. So this is incorrect.
• Analyze Option 2: The average gestation period (time to mature after conception) is about 40 weeks, not 30. So this is incorrect.
• Analyze Option 3: Fetal organ systems do not develop at a steady rate. Major development happens in the first trimester, with growth and refinement in later trimesters. So this is incorrect.
• Analyze Option 4: For proper growth, a fertilized egg (zygote) must implant in the uterine wall. This is a key step in pregnancy to establish the placenta and support fetal development. This statement is correct.

Answer:

D. To ensure proper growth, a fertilized egg must implant in the wall of the uterus.