Endocrine glands produce hormones.

The image shows some of the glands of the human endocrine system. 

Label glands A to F.

The menstrual cycle is controlled by hormones.

Choose the correct statements about the hormones that control the menstrual cycle.

Describe the roles of FSH and LH in the menstrual cycle.

Describe how hormones control the menstrual cycle.

The hypothalamus, pituitary gland and ovaries work together to regulate the menstrual cycle.

The graph below shows how the concentrations of four hormones change throughout the menstrual cycle.

Name hormones A, B, C and D.

Ovulation occurs on day 14 of this 28 day cycle.

Name two hormones that peak immediately before ovulation.

The lining of the uterus thickens between days 7 and 27 of the menstrual cycle.

Which hormone is responsible for the thickening of the uterus lining?

State the purpose of the thickening of the uterus lining.

One type of contraceptive pill keeps the level of progesterone high for most of the cycle.

Suggest how it works.