Luteinizing hormone or LH is synthesized by the pituitary gland after sexual maturity and the onset of the first menstrual period. LH production is regulated by GnRH. If a woman takes a hormone test on the third day of the menstrual cycle from a blood sample, the normal result would be 2-10 mIU/mL.
However, sometimes disturbances occur that cause abnormal LH levels in the blood, either above or below the reference value. Possible causes of higher than normal LH levels include early menopause, polycystic ovarian syndrome (PCOS) or a pituitary tumor, among others. On the other hand, if LH levels are below normal, it is possible that it is due to an eating disorder or an excess of prolactin.
Read the full article on: What are the functions of the LH hormone in the reproductive cycle? ( 68).
By Marta Barranquero Gómez B.Sc., M.Sc. (embryologist), Paloma de la Fuente Vaquero M.D., Ph.D., M.Sc. (gynecologist), Paula Fabra Roca M.D., M.Sc. (gynecologist), Zaira Salvador B.Sc., M.Sc. (embryologist) and Cristina Algarra Goosman B.Sc., M.Sc. (psychologist).
Last Update: 12/01/2023
