2021HSCMultiple choice
Q12
1 mark
Question
The graph shows the levels of three hormones, oestrogen, progesterone and human chorionic gonadotrophin (HCG), measured in the blood of a woman during her pregnancy.
Which statement can be inferred from the graph?
A. Birth occurred about week 36.
B. Fertilisation occurred at day 0.
C. Implantation occurred about week 4.
D. The placenta was formed about week 24.

Syllabus alignment
Module 5 · HeredityWorking Scientifically
- ReproductionAnalyse fertilisation, implantation and hormonal control of mammalian pregnancy and birth.