Proficiency Testing/EQA / 2025 Surveys / New Programs Help Please log in to determine if you are eligible to purchase PT Programs. PARATHYROID HORMONE - PTH Analyte Challenges per Shipment Number of Shipments Parathyroid hormone (PTH) 5 Three shipments per year Program Information Five 2.0‑mL lyophilized serum specimens Conventional and International System of Units (SI) reporting offered Shipping Schedule Shipment A: January 27 Shipment B: June 23 Shipment C: November 11 Guest Log in/Register Customers Who Bought This Item Also Bought INSULIN, GASTRIN, AND C-PEPTIDE VIEW DETAILS > QUALITY CROSS CHECK-PARATHYROID HORMONE VIEW DETAILS >