Hormones
Hormones are biochemical substances produced by various glands in the body, forming a part of the endocrine system. They are secreted directly into the bloodstream and travel to specific organs or tissues where they exert their effects.
Hormones act as chemical messengers and play a crucial role in regulating many physiological processes in the body.
Follicle stimulating hormone (FSH)
FSH is produced by the pituitary gland and plays a central role in ovarian follicle development and sperm production. Levels are used in fertility assessment and when investigating ovarian, testicular or menopausal function.
Luteinising hormone (LH)
LH is a pituitary hormone involved in ovulation in women and testosterone production in men. It is commonly assessed as part of fertility and reproductive-hormone testing.
Oestradiol (E2)
Oestradiol is the main circulating oestrogen during the reproductive years. It is involved in the menstrual cycle, fertility, bone health and sexual function and is interpreted alongside other reproductive hormones.
Prolactin
Prolactin is produced by the pituitary gland and is best known for its role in breast-milk production. Abnormally high levels can affect periods, fertility, libido and testosterone production.
Testosterone
Testosterone is an androgen hormone involved in sexual function, fertility, muscle mass, bone health and energy. Levels vary with age, sex and time of day and are interpreted alongside symptoms and other hormone results.