⚗️ Endocrinology

17-Hydroxyprogesterone 17-OHP, 17-OH Progesterone Serum (SST, 9 AM) › 9 AM Cortisol Morning Cortisol, Basal Cortisol Serum (SST; must be taken 08:00–09:00) › ACTH Adrenocorticotropic Hormone, Corticotropin EDTA plasma (ice, process within 30 min or freeze immediately) › Aldosterone Serum Aldosterone, Plasma Aldosterone Concentration (PAC) Serum or EDTA plasma (posture and salt intake affect level; check local protocol) › Anti-Thyroglobulin Antibody Anti-Tg, TgAb Serum (SST) › Anti-Thyroid Peroxidase Antibody Anti-TPO, TPO Antibody Serum (SST) › DHEA-Sulphate DHEA-S, Dehydroepiandrosterone Sulphate Serum (SST) › Free T3 FT3, Free Triiodothyronine Serum (SST) › Free T4 FT4, Free Thyroxine Serum (SST) › Growth Hormone GH, Somatotropin Serum (SST) › IGF-1 Insulin-like Growth Factor 1, Somatomedin C Serum (SST) › PTH-related Peptide PTHrP, Parathyroid Hormone-related Protein EDTA plasma (on ice, process promptly) › Parathyroid Hormone PTH, Intact PTH EDTA plasma (on ice, process promptly) › Plasma Renin Direct Renin, Plasma Renin Activity (PRA) EDTA plasma (standing for ≥2h before sampling; avoid beta-blockers if possible) › Thyroglobulin Tg, Serum Thyroglobulin Serum (SST; measure alongside Anti-Tg) › Thyroid-Stimulating Hormone TSH, Thyrotropin Serum (SST) ›