The following formula is used to calculate the Hcg ratio for a given baseline and 48-hour Hcg level:
\[ R = \frac{H_{48}}{H_{0}} \]
To calculate the Hcg ratio, divide the Hcg level at 48 hours by the Hcg level at baseline.
Let's say we have an Hcg level at baseline of 1000 IU/L and an Hcg level at 48 hours of 1500 IU/L. To find the Hcg ratio, we can use the formula:
\[ R = \frac{1500}{1000} = 1.5 \]
Therefore, the Hcg ratio is 1.5.