The thyroid gland (a small, butterfly-shaped gland located in front of the neck) secretes the following hormones:
Triiodothyronine (T3)
Thyroxine (T4)
Thyroid Stimulating Hormone (TSH) is a hormone secreted into the blood by Pituitary gland (a gland present in the brain). It directs thyroid gland to produce and release the thyroid hormones (T3 & T4) into the blood. The iodine from the food stimulates the thyroid gland to make the thyroid hormones.
The thyroid hormones regulates the growth and metabolism of the body. If the thyroid gland produces very high amounts of these hormones (T3 and T4), you may experience symptoms of weight loss, rapid heartbeat, tremors, sweating, anxiety, increased sensitivity towards heat, etc. and this is known as Hyperthyroidism.
The decreased production of thyroid hormones (T3 and T4) results in Hypothyroidism which may cause weight gain, fatigue, slow heart rate, increased sensitivity towards cold, depression, dry and thin hair, etc.
Category
Haematology
Prerequisite
8-9 Hrs fasting needed
Normal Range
| TSH Reference Range | |
| 0-5 days | 0.7-15.2mIU/L |
| 6 days-2 months | 0.7-11.0mIU/L |
| 3-11 months | 0.7-8.4mIU/L |
| 1-5 years | 0.7-6.0mIU/L |
| 6-10 years | 0.6-4.8mIU/L |
| 11-19 years | 0.5-4.3mIU/L |
| > or =20 years | 0.3-4.2mIU/L |
| F4 | |
| 0-3 days | 0.7-2.7ng/dL |
| 4-30 days | 0.8-3.1ng/dL |
| 1-23 months | 0.5-2.3ng/dL |
| 2-6 years | 0.9-1.8ng/dL |
| 7-11 years | 0.9-1.7ng/dL |
| 12-19 years | 0.9-1.6ng/dL |
| 20 years and older | 0.8-1.7ng/dL |
| Pregnancy, 1st Trimester | 0.9-1.4ng/dL |
| Pregnancy, 2nd Trimester | 0.7-1.3ng/dL |
| F3 | |
| 0-3 days | 2.0-7.9pg/mL |
| 4-30 days | 2.0-5.2pg/mL |
| 1-24 months | 1.6-6.4pg/mL |
| 2-6 years | 2.0-6.0pg/mL |
| 7-17 years | 2.9-5.1pg/mL |
| 18 years and older | 2.4-4.2pg/mL |
Type of sample to be collected
Blood Sample
