During the early stages of pregnancy,the hormone ________ maintains the corpus luteum,until the placenta is established.
A) human chorionic gonadotropin
B) testosterone
C) estrogen
D) progesterone
E) androgen
Correct Answer:
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Q1: The symptoms of fetal alcohol syndrome include
A)
Q2: Blood rich in oxygen and nutrients is
Q3: Muscle contractions of the uterine wall and
Q4: The foramen ovale is an opening that
Q5: Dizygotic twins result from the combination of
A)
Q7: The external reproductive organs can be distinguished
Q8: Teratogens are substances that
A) stimulate embryonic growth.
B)
Q9: The fetal stage of development begins at
Q10: Development is a continuous process during which
Q11: The postnatal period extends from
A) the fertilized
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