LH (luteinizing hormone) :
- It is produced by the pituitary gland.
- It plays an important role in sexual development and functioning.
LH surge:
- Due to a rise in luteinizing hormone, ovulation is spontaneously triggered. It is known as LH surge.
- It initiates the beginning of ovulation (fertile period).
- It begins around 36 hours before ovulation.
- The released egg survives for about 24 hours.