LH
Luteinizing Hormone (LH) is produced by the pituitary gland in the
brain. Control of
LH production is a complex system involving hormones
produced by the gonads (ovaries or testes), the pituitary, and the
hypothalamus.
Women’s menstrual cycles are divided into 2 phases,
the follicular and luteal, by a mid-cycle surge of follicle-stimulating
hormone (FSH) and
LH. The high level of
LH (and FSH) at mid-cycle
triggers ovulation.
LH also stimulates the ovaries to produce steroids,
primarily estradiol. Estradiol and other steroids help the pituitary to
regulate the production of
LH. At the time of menopause, the ovaries
stop functioning and
LH levels rise.
In men,
LH stimulates the
Leydig cells in the testes to produce testosterone.
LH levels are
relatively constant in men after puberty. Testosterone provides negative
feedback to the pituitary and the hypothalamus, helping to regulate the
amount of
LH secreted.
Product Specifications:
- Product code: GDB71625
- Calibrators: 0, 5, 25, 50, 100, 200 mlU/ml (2nd IRP 68/40)
- Sample: 50 µl
- Sensitivity: 0.8 mIU/ml
- Total Time: 75 Minutes
- Shelf Life: 18 Months