{"id":3330,"date":"2026-08-28T08:11:47","date_gmt":"2026-08-28T07:11:47","guid":{"rendered":"https:\/\/seamlessbio.de\/?page_id=3330"},"modified":"2026-08-28T08:16:16","modified_gmt":"2026-08-28T07:16:16","slug":"what-is-fertility-serum-ivd","status":"publish","type":"page","link":"https:\/\/seamlessbio.de\/de\/what-is-fertility-serum-ivd\/","title":{"rendered":"What is Fertility Serum for IVD Development?"},"content":{"rendered":"
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Quick Definition<\/p>\n

What is Fertility Serum for IVD Development?:<\/strong> Fertility serum for IVD development refers to native human serum and plasma collected from donors at defined hormonal states \u2014 including pregnant donors at specific gestational stages, and donors with elevated or depleted fertility hormones such as AMH, FSH, LH, progesterone and estradiol. These materials are used as the clinical matrix for developing, calibrating and validating in vitro diagnostic assays for pregnancy testing, ovarian reserve assessment, and reproductive hormone monitoring.<\/p>\n<\/div>\n\n

Which fertility hormones are measured by IVD assays?<\/h2>\n

Fertility and reproductive endocrinology IVDs cover a broad range of hormones with distinct clinical applications:<\/p>\n\n
Hormone \/ Analyte<\/th>Clinical use<\/th>Key decision levels<\/th><\/tr>\n
\u03b2-hCG (human chorionic gonadotropin)<\/td>Pregnancy detection, ectopic pregnancy, molar pregnancy monitoring<\/td><5 IU\/L (negative), >25 IU\/L (positive), >100,000 IU\/L (1st trimester peak)<\/td><\/tr>\n
AMH (Anti-M\u00fcllerian Hormone)<\/td>Ovarian reserve assessment, IVF prognosis, PCOS<\/td><0.5 ng\/mL (low), 1\u20134 ng\/mL (normal), >5 ng\/mL (high\/PCOS)<\/td><\/tr>\n
FSH (Follicle Stimulating Hormone)<\/td>Ovarian reserve, menopause, pituitary function<\/td>>10 IU\/L (reduced reserve), >25 IU\/L (menopause)<\/td><\/tr>\n
LH (Luteinising Hormone)<\/td>Ovulation detection, LH surge monitoring<\/td>LH surge 2\u20133\u00d7 baseline \u2014 ovulation typically 24\u201336h after surge<\/td><\/tr>\n
Progesterone<\/td>Ovulation confirmation, luteal phase assessment, early pregnancy support<\/td>>3 ng\/mL (ovulation confirmed), >10 ng\/mL (adequate luteal phase)<\/td><\/tr>\n
Estradiol (E2)<\/td>Follicular monitoring, IVF stimulation, menopause<\/td>Follicular: 20\u2013150 pg\/mL; pre-ovulatory: >200 pg\/mL<\/td><\/tr>\n<\/table>\n\n

Why is native human serum the correct matrix for fertility IVD development?<\/h2>\n

Fertility hormone assays are highly matrix-sensitive \u2014 the protein composition, viscosity, and endogenous interference burden of the sample matrix significantly affect assay performance. Native human serum from pregnant or hormone-defined donors provides the most clinically relevant matrix for calibrator preparation, commutability assessment, and cross-reactivity testing. Spiked or recombinant hormone preparations in artificial buffers behave differently from native hormone in a complex protein matrix \u2014 particularly for assays measuring structurally complex glycoprotein hormones such as hCG, FSH and LH, where glycoform distribution affects immunoreactivity.<\/p>\n\n

hCG assay development \u2014 why serum AND urine are needed<\/h2>\n

Pregnancy tests are designed for two primary matrices: serum (laboratory quantitative hCG) and urine (home pregnancy tests and point-of-care qualitative assays). The same hCG molecule behaves differently in these two matrices \u2014 urinary hCG is partially metabolised and predominantly present as hCG beta core fragment, while serum hCG is predominantly intact hCG and nicked hCG. IVD manufacturers developing urine pregnancy tests must validate with native urine from pregnant donors \u2014 not serum. For quantitative serum hCG assays, trimester-specific native serum across the full concentration range is required for calibration and commutability assessment.<\/p>\n\n

Hook effect in hCG assays<\/h2>\n

At very high hCG concentrations (typically >500,000 IU\/L, seen in molar pregnancy and choriocarcinoma), some immunoassay formats show a hook effect \u2014 the signal paradoxically decreases at very high analyte concentrations because both capture and detection antibodies are saturated with free analyte rather than forming the sandwich complex. Characterising the hook effect requires native serum from very high hCG donors or serial dilutions of early pregnancy serum at high concentrations. This is a mandatory part of performance evaluation for quantitative hCG IVDs.<\/p>\n\n

Key Facts<\/h2>\n