Luteinising Hormone (LH) is produced and released in the anterior pituitary gland and is an important part of a woman’s menstrual cycle.
Oestradiol is a steroid hormone and the strongest of the three naturally-produced oestrogens. It has many functions but primarily acts to mature and maintain the female reproductive system.
Testosterone is the primary male sex hormone – it plays a huge role in the development of male reproductive tissues as well as promoting secondary characteristics such as muscle and bone mass, libido and growth of bodily hair.
Prolactin is a protein known for its role in enabling mammals, namely females, to produce milk.
Free androgen index (FAI)
This is used to determine abnormal androgen levels. It is a ratio of total testosterone level divided by the sex hormone binding globulin (SHBG) level and then multiplying by a constant, usually 100. In women, an elevated FAI is seen in polycystic ovarian syndrome (PCOS). In males, the FAI provides a good indication of testosterone status.