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Use Cases: Bacteriostatic water is ideal for multi-dose injections, while sterile water is often used for immediate-use medications

Quick Facts Normal early rise: 48 to 72 hours Expected slowdown: Starts at 1,200 mIU/mL Minimum 48-hour increase: 35% to 60% Ultrasound threshold: 1,500 to 2,000 mIU/mL Updated Jun 12, 2026 Reviewed by 100Calc Research Team Pregnancy & Fertility Calculator hCG Doubling Time Calculator Calculate your Beta hCG doubling time and 48-hour percentage increase

Before you begin your journey with Chioma Okafor-Mbah, MD, dipl.ABOM, shell help you understand the importance of closely tracking your results and being patient

TABLE 2 Characteristics of the included studies