Hormones
This category collects all articles related to hormone testing and endocrine evaluation. Each article describes what the test measures, why and when it is ordered (including special sample timing such as fasting or morning draws), how the sample is collected, typical reference ranges, and common causes and clinical signs of abnormal results—written simply for patients, students, and healthcare professionals.
Growth Hormone Test: Meaning, High/Low Levels & Normal Ranges
Learn about the Growth Hormone (GH) Test, its purpose, symptoms of high and low GH, reference ranges, causes, preparation, and...
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FT3 (Free Triiodothyronine) Test – Normal Range, Function, and Causes of High & Low Levels
The FT3 (Free Triiodothyronine) test measures the active thyroid hormone in your blood. It helps diagnose thyroid disorders such as...
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Metanephrines Plasma Test: Purpose, Normal Range, Symptoms & Tumor Detection
Learn what the Metanephrines Plasma Test measures, causes of high levels, symptoms, ranges, preparation, and when to seek medical care.
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IGF-1 Test: Growth Hormone Marker, High/Low Levels & Symptoms
IGF-1 test helps diagnose growth disorders, acromegaly, gigantism, and GH deficiency. Learn functions, causes of high/low levels, symptoms, and reference...
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T4 (Thyroxine) Test – Normal Range, Function, Causes of High & Low T4 Explained
The T4 (Thyroxine) test measures the level of thyroid hormone in the blood to assess thyroid function. Learn about normal...
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Estradiol (E2) Blood Test – Normal Range, Function, and Hormonal Importance
The Estradiol (E2) blood test measures estrogen levels in the blood to assess fertility, menstrual health, and hormone balance. It...
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Prolactin (PRL) Test – Function, Normal Range, and Causes of High & Low Levels
The Prolactin test measures the level of prolactin hormone in the blood. It helps evaluate fertility, menstrual irregularities, and pituitary...
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Low ACTH Levels: Causes, Symptoms, and Safe Ways to Improve Levels
Learn the causes, symptoms, and risks of low ACTH levels, along with safe, medically approved ways to manage hormonal imbalance....
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FT4 (Free Thyroxine) Test – Normal Range, Function, Symptoms, and Complete Guide
The FT4 test measures the free thyroxine hormone level in your blood. It helps detect thyroid disorders like hypothyroidism and...
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T3 (Triiodothyronine) Test – Normal Range, Function, High & Low T3 Levels Explained
The T3 (Triiodothyronine) test measures active thyroid hormone levels to evaluate thyroid function. Learn about its normal range, function, causes,...
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17-OHP (17-Hydroxyprogesterone) Test – Meaning, Function, Normal Range, and Clinical Importance
The 17-OHP (17-Hydroxyprogesterone) test measures a hormone produced by the adrenal glands and gonads. It helps diagnose congenital adrenal hyperplasia...
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ADH (Antidiuretic Hormone) Test: Purpose, Normal Range & High/Low Causes
The ADH test measures antidiuretic hormone (vasopressin) levels to assess water balance, blood pressure, and kidney function in conditions like...
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