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IB Biology HL D3.1.17 Hl Pregnancy Testing Questions

Trace how HCG from the early embryo or placenta maintains the corpus luteum, then how monoclonal antibodies detect urinary HCG in pregnancy tests.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain that the early embryo or blastocyst secretes HCG after implantation.
  • Link HCG to maintenance of the corpus luteum and continued progesterone support of the endometrium.
  • Explain that pregnancy tests use monoclonal antibodies to detect HCG.

IB Biology HL D3.1.17 Hl Pregnancy Testing Questions question 1

[Maximum number: 1]

What is a function of human chorionic gonadotropin (HCG)?

A

To stimulate the corpus luteum to produce progesterone during early pregnancy

B

To stimulate contraction of uterine muscles at the onset of birth

C

To inhibit the production of progesterone and prevent menstruation during pregnancy

D

To prevent polyspermy during fertilization in the fallopian tubes

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