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Immunoradiometric assay for quantitative determination of follicle-stimulating hormone (FSH) in human serum or plasma


  • KFDA Registration No


  • CAT No





    25 ul




    0-200 mIU/ml

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Intended Use

Immunoradiometric assay for quantitative determination of follicle-stimulating hormone (FSH) in human serum or plasma


Follicle stimulating hormone (FSH) is secreted by the β-cells of the anterior pituitary under the control of the gonadotropin releasing hormone produced in the hypothalamus. It is a glycoprotein with a molecular weight of approximately 28,000 consisting of two different polypeptide subunits designated alpha (α) and beta (β) which are associated by not covalent binding. The subunit alpha (α) compound by 89 amino acids, has a similar structure as other glycoprotein hormone (FSH, LH, TSH and HCG). The subunit beta (β), a specific hormone, gives the immunological feature to the whole molecule. The alpha (α) chains of FSH, LH, TSH and HCG are biochemically identical, whereas the beta (β) chains are biochemically unique and confer biological and immunological specificity. Bioactivity is also determined by the beta (β) chain. The FSH is produced by the basophil cells of the frontal lobe of hypophysis. The secretion is stimulated by the hypophysis glands are the gonadotropin releasing hormone (GnRH). The FSH facilitates the development and maintenance of gonadal tissues, which synthesize and secrete steroid hormones. The activity of the hypothalamic and hypophysis glands are controlled by the concentration of the circulating steroids performs the decrease or increase of FSH (negative feedback). Circulating level of FSH is controlled by a negative feedback effect on the hypothalamus by steroidal hormones.


The RIAKEY FSH IRMA Tube II is an one step non-competitive immunoradiometric (IRMA) method (“sandwich”). The method employs two highly specific monoclonal anti-FSH antibodies which recognize two different epitopes of the molecule. One antibody is coated on solid phase (coated tube), the other, specific for the FSH and labeled with Iodine-125, is used as a tracer. Antibody-coated polystyrene tubes serve as solid phase. The tracer antibody and the coated antibody react simultaneously with the FSH antigen present in the standards, control serum and samples. Unbounded material is removed by a washing step. The amount of bound tracer will be directly proportional to the FSH antigen concentration and the remaining radioactivity bound to the tubes is measured in a gamma scintillation counter.

Use Precaution

Be careful when handling all samples, reagents, or devices used in the test as they may be the source of infection.
All reagents, human body samples, etc. are handled at the designated location.

  1. Do not use mixed reagents from different lots.
  2. Do not use reagents beyond the expiration date.
  3. Use distilled water stored in clean container.
  4. Use an individual disposable tip for each sample and reagent, to prevent the possible cross-contamination among the samples.
  5. Store the unused coated tubes at 2~8ºC in the appropriate bags with silica gel and accurately sealed.
  6. If large quantity of assay would be performed at one time, there might be substantial time variation between 60 tubes at one time to minimize time variation. Also, do not exceed 10 minutes for entire pipetting.
  7. Wear disposable globes while handling the kit reagents and wash hands thoroughly afterwards.
  8. Do not pipette by mouth.
  9. Do not smoke, eat or drink in areas where specimens or kit reagents are handle.
  10. Handle samples, reagents and loboratory equipments used for assy with extreme care, as they may potentially contain infectious agents.
  11. When samples or reagents happen to be split, wash carefully with a 3% sodium hypochlorite solution.
  12. Dispose of this cleaning liquid and also such used washing cloth or tissue paper with care, as they may also contain infectious agents.
  13. Avoid microbial contamination when the reagent vial be eventually opend or the contents be handled.
  14. Use only for IN VITRO.