Ascendis reports positive 52-week trial data for achondroplasia treatment

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Week 52 COACH Trial Topline Results Confirm Consistent and Durable Treatment Benefits in Children with Achondroplasia (ACH)

January 8, 2026 4:01 PM EST

Once-weekly TransCon® CNP and TransCon® hGH combination therapy showed durable growth without compromising safety or tolerability at 52 weeks

Annualized growth velocity (AGV) exceeded the 97th-percentile of average stature children

ACH height Z-score improvements indicated a tripling of efficacy compared to TransCon CNP monotherapy

Combination therapy demonstrated benefits beyond linear growth with improvements in body proportionality and arm span, aligning with the increase in linear growth

All children completed 52 weeks of treatment and remain on therapy in COACH as of... More