The estriol market is estimated at USD 37.7 million in 2026, is projected to reach USD 64.5 million by 2036 and is forecast to register a 5.5% CAGR between 2026 and 2036. In 2026, ≥99% API holds 52.0% of purity grade sales and creams & gels represent 46.0% within the form segment.