|ID:118 ||Luteinising hormone (LH)||Search Links: General Info : Protocols : Patient Info|
|Description||Anterior pituitary hormone. PLEASE NOTE: TEST CAN ONLY BE ADDED TO A SAMPLE WITHIN 8 HOURS OF COLLECTION|
|Indication||Menstrual disorders, infertility, hirsutism, virilisation, hypogonadism, gynocomastia, pituitary/hypothalamin disorder.
|Additional Info||PRIMARY OVARIAN FAILURE: FSH > 30 IU/L with LH often above 20 IU/L. Increased LH alone is not indicative. Other considerations with raised levels of LH include the mid cycle surge, PCO, pregnancy (due to HCG) and HCG secreting tumours. LOW/UNDETECTABLE GONADOTROPHINS: May be normal but secondary hypogonadism due to hypothalamic/pituitary disorders must be considered. Also consider the possibility of raised oestrogens e.g oral contraceptives, oestrogen producing tumours. The ratio of FSH:LH is used to monitor levels which are not in the post - menopausal range. May be associated with climateric, hypothalamic defect or early follicular phase. It is important to assess oestrogen status (females) and androgen status (males) for the interpretation of gonadotrophins. Thus amenorrhoeic women with normal FSH/LH may be oestrogen deficient and in effect hypogonadotrophic.
|Ref. Range (Male)||1 - 9 |
|Ref. Range (Female)||1 - 10 |
|Ref. Range (Paed)|| |
|Ref. Range Notes||prepubertal <2 iu/l, males <10 iu/l, females (follicular/luteal) <10 iu/l
|IP Acute TAT||Refer to Website|
|IP Routine TAT||Refer to Website|
|GP Acute TAT||- Contact Laboratory|
|GP Routine TAT||Refer to Website|
|Turnround Comment||Minimum re-test interval = 7 days|
Originally edited by : JHB. Last edited on 04/12/2015 15:56:42. Published By S.Bennett on 04/12/2014 15:56:42.