This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tests of Ovulation, Subject name: Gynaecology & Obstetrics
The tests that may help to know the occurrence of ovulation in a women include all except 
Select and explain. 
A. USG, B. Levels of progesterone, C. Temperature changes, D. Levels of oestradiol
D: Levels of oestradiol
Answer: D: Levels of oestradiol 
Explanation: Test for Ovulation Cervix mucus changes Basal body temperature increases during ovulation by 0.5o F Vaginal cytology Serum progesterone Endometrial biopsy TVS - to see follicular rupture monitoring Urinary LH kit Diagnostic Laparoscopy