Developmental events that occur during the fetal period include which of the following? a. All the teeth have formed by the sixteenth week. b. By the twenty-eighth week, the fetus can potentially survive outside the uterus. c. The fetus takes over production of hormones. d. By the sixth week, male and female external genitalia are visible.
Question
Developmental events that occur during the fetal period include which of the following? a. All the teeth have formed by the sixteenth week. b. By the twenty-eighth week, the fetus can potentially survive outside the uterus. c. The fetus takes over production of hormones. d. By the sixth week, male and female external genitalia are visible.
Solution
The correct answer is:
b. By the twenty-eighth week, the fetus can potentially survive outside the uterus.
Explanation:
a. All the teeth have formed by the sixteenth week. - This is incorrect. The primary teeth begin to form around the sixth week of pregnancy, but they don't finish developing until after birth.
b. By the twenty-eighth week, the fetus can potentially survive outside the uterus. - This is correct. With modern medical technology, a fetus born at 28 weeks has a good chance of survival, although they would likely require care in a neonatal intensive care unit.
c. The fetus takes over production of hormones. - This is incorrect. While the fetus does begin to produce some of its own hormones during pregnancy, it does not take over the production of all hormones.
d. By the sixth week, male and female external genitalia are visible. - This is incorrect. While the sex of the fetus can be determined by the presence of certain structures as early as the sixth week, the external genitalia are not typically visible until around the 12th week of pregnancy.
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