QuestionSBA
QuestionChoice
Human chorionic gonadotrophin is produced by the placenta and maintains the corpus luteum in early pregnancy. Its levels significantly decrease at week 15-16 of pregnancy.
10027179
d
Human chorionic gonadotrophin levels rise until week 26-28 of pregnancy, then suddenly reduce to undetectable levels
QuestionChoice
Progesterone is mostly produced by the corpus luteum until around week 10 of pregnancy. After this, progesterone is mostly produced by the placenta.
10027176
a
The corpus luteum is the main source of progesterone until week 10 of pregnancy
QuestionChoice
Oxytocin is produced at the start of labour, stimulating uterine muscle (myometrium) contractions. It is produced and secreted by the posterior pituitary gland, not the placenta.
10027177
b
Oxytocin, produced by the placenta, stimulates myometrial contraction at the start of labour
QuestionChoice
The increase in oxytocin, not progesterone, at the beginning of labour triggers prostaglandin production, which helps to increase uterine contractions.
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e
Increased prostaglandin production at the start of labour is triggered by progesterone
QuestionChoice
Prolactin does cause enlargement of the mammary glands during pregnancy, preparing them for milk production. It is produced and secreted by the anterior pituitary gland, not the posterior pituitary gland.
10027178
c
Prolactin, produced by the posterior pituitary gland, causes mammary gland enlargement
Concept
Chapter
2693
4251
Pregnancy hormones
Topic
175
Reproductive Physiology
17833
Which statement regarding hormones in pregnancy is correct?
a