1. Female Reproductive Health

Serum gonadotropins are essential for assessing and managing the female reproductive cycle:

▸ FSH promotes ovarian follicle development.

LH causes ovulation.

Monitoring these hormones aids in diagnosis of:

▸ Polycystic Ovarian Syndrome (PCOS)

▸ Ovarian insufficiency

▸ Ovulation disorders

They are also useful markers in fertility tests and hormone balance checks.

2. Male Reproductive Function

In men, FSH and LH regulate:

▸ Spermatogenesis (sperm creation)

▸ Testosterone synthesis

Abnormal hormone levels can indicate hypogonadism or testicular dysfunction, making serum gonadotropins essential for male fertility examinations.

3. Infertility Diagnosis and Assisted Reproductive Technology (ART)

Serum gonadotropins have a significant impact on infertility testing and therapy, including:

▸ Assessing ovarian reserve (eg, increased FSH indicates deterioration)

▸ Identifying hormonal abnormalities that influence fertility

▸ Supporting treatment planning for IVF and ICSI

Exogenous FSH is supplied during controlled ovarian stimulation (COS) in IVF to encourage multiple follicle development, while LH activity is regulated with GnRH analogues to prevent premature ovulation, resulting in better clinical results.

4. Evaluation for Endocrine Disorders

Abnormal FSH or LH levels could indicate:

▸ Primary Ovarian Insufficiency (POI)

▸ Hypogonadotropic hypogonadism

▸ Other endocrine dysfunctions that influence reproduction

FSH and LH naturally fall during pregnancy due to elevated hCG levels, making them useful for monitoring early pregnancy in fertility treatments.