Gynaecology & Obstetrics There is a mid-cycle shift in the basal body temperature (BBT) after ovulation in women. This is caused by: A FSH-peak B LH-peak C Estradiol D Progesterone 💡 Explanation There is a mid-cycle shift in the basal body temperature (BBT) after ovulation in women. This is caused by: ✓ Correct Answer: D. Progesterone