Pregnancy hCG Calculator (Reverse Lookup)

Standard pregnancy calculators use the Last Menstrual Period date to estimate progress. However, women with irregular cycles often rely on blood serum beta hCG levels for a more accurate biological marker. This tool reverses the standard logic. By inputting a hormone level, it scans clinical datasets to find the corresponding gestational weeks. Due to the exponential nature of hCG, one value often overlaps multiple weeks. The tool accounts for this variance by providing a probable range rather than a single fixed date.

The estimation searches the dataset S where the input h falls within the range [min, max].

Since ranges overlap, the result is the union of all matching weeks.