Serum gonadotrophin is a key hormone that regulates reproductive health, particularly in women. It has an impact on important fertility processes like ovulation and menstruation. Understanding how this hormone functions is critical for diagnosing and treating fertility-related issues.
Definition and Function
Serum gonadotrophin primarily refers to two hormones produced by the pituitary gland: follicle-stimulating hormone (FSH) and luteinizing hormone.
- FSH increases the development and maturity of ovarian follicles, each containing an egg.
- LH stimulates ovulation (the release of a mature egg) and promotes progesterone production, preparing the uterus for probable pregnancy.
These hormones work together to ensure normal reproductive cycles.
Measurement and Interpretation
Serum gonadotrophin levels can be measured using a blood test, which is often conducted on various days of the menstrual cycle based on The clinical purpose.
- Day 3 tests (FSH and LH): Used to assess ovarian reserve and probable infertility. High FSH levels can indicate reduced ovarian function or premature ovarian insufficiency.
- Day 21 progesterone test: Determines whether ovulation happened during the cycle.
- Elevated LH levels at inappropriate periods may indicate polycystic ovarian syndrome (PCOS).
Proper interpretation of these findings is critical for detecting reproductive health issues.
Factors influencing serum gonadotropin
Several internal and environmental factors affect FSH and LH levels:
- Age: As women get older, their ovarian function declines, which is often reflected in changes in serum gonadotrophin levels.
- Body mass index (BMI)
- A high BMI may elevate LH levels and prevent ovulation.
- A very low BMI can impair gonadotrophin production, which affects follicle growth.
- Stress: Elevated stress hormones such as cortisol can suppress FSH production.
- Exercise: Extremely intense physical activity may reduce serum gonadotrophin due to low energy availability.
These factors highlight the importance of overall health in maintaining normal fertility hormone balance.
