Hormonal assessment for reproductive and endocrine health.
The LH/FSH Ratio Test measures the levels of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) in the blood to assess ovarian and testicular function. It is commonly used to evaluate conditions such as Polycystic Ovary Syndrome (PCOS), hypogonadism, and infertility.
Covid Safety
Assured
Free Report
Counselling
Recommended for You
How our test process works!
Overview
The LH/FSH ratio test measures the levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in the blood to assess reproductive and hormonal function. It is primarily used to evaluate conditions such as polycystic ovary syndrome (PCOS),infertility, primary ovarian insufficiency, and hypogonadism or testicular function.
Risk Assessment
The LH/FSH ratio is particularly useful in assessing:
Polycystic Ovary Syndrome (PCOS) – An elevated ratio (>2:1 or >3:1) is suggestive of PCOS.
Primary Ovarian Insufficiency (POI) – Low levels of both hormones indicate ovarian failure.
Hypogonadotropic Hypogonadism – A low ratio with low LH and FSH suggests pituitary or hypothalamic dysfunction.
Menopause – Increased FSH levels with a normal or low LH level indicate menopause.
Male Hypogonadism – Helps differentiate primary and secondary causes of low testosterone.
Normal Reference Range
| Hormone | Follicular Phase | Ovulatory Phase | Postmenopausal |
| LH | 2–12 IU/L | 8–89 IU/L | 15–62 IU/L |
| FSH | 3–10 IU/L | 6–26 IU/L | 20–138 IU/L |
LH:FSH Ratio:Around 1:1 in normal reproductive age women
Interpretation of LH:FSH Ratio
| LH:FSH Ratio | Clinical Implication |
| >2:1 or >3:1 | Suggestive of PCOS (not diagnostic alone) |
| ~1:1 (normal) | Normal ovulatory cycle or balanced gonadotropin secretion |
| <1:1 | May indicate hypogonadotropic hypogonadism, or pituitary suppression |
Note: LH:FSH ratio is not a stand-alone diagnostic marker. It should be interpreted with clinical features, ultrasound findings, and androgen levels in PCOS.
Sample Type & Collection
- Specimen: Venous blood
- Sample Tube: Serum (Red-top or SST tube)
- Fasting Required: No
- Best Collection Time: Early follicular phase (Day 2-5 of the menstrual cycle) for women.
Frequently Asked Question
LH/FSH Ratio Test
Hormonal assessment for reproductive and endocrine health.
The LH/FSH Ratio Test measures the levels of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) in the blood to assess ovarian and testicular function. It is commonly used to evaluate conditions such as Polycystic Ovary Syndrome (PCOS), hypogonadism, and infertility.
Covid Safety
Assured
Free Report
Counselling