Organon & Co. will license exclusive global development, manufacturing and commercial rights to ebopiprant (OBE-022) from Obseva SA. Ebopiprant is a prostaglandin F2α receptor antagonist being developed for treating preterm labor by reducing inflammation and uterine contractions. Obseva could receive tiered double-digit royalties on commercial sales and as much as $500 million in up-front and milestone payments, including $25 million to be paid at signing, up to $90 million in development and regulatory milestones and up to $385 million in sales-based milestones.

With the PDUFA date for relugolix against prostate cancer growing nearer and data in castration resistance-free patients closer still, Myovant Sciences GmbH aims to wring more from the oral, once-daily gonadotropin-releasing hormone receptor antagonist, studying it in uterine fibroids and endometriosis.

Geneva-based Obseva SA’s phase III Primrose 2 trial with gonadotropin-releasing hormone (GnRH) antagonist linzagolix in heavy menstrual bleeding (HMB) due to uterine fibroids (UFs) hit the primary endpoint in 94% of patients, and the company in the second quarter of 2020 will report six-month data from the Primrose 1 study, which is also a phase III experiment, in the same indication.

DUBLIN – Obseva SA's stock plunged 65% Thursday on news that it was terminating development of its in vitro fertilization (IVF) drug, nolasiban, after it missed the primary endpoint of a confirmatory phase III trial. The result blindsided both Obseva and investors, as the outcome was at odds with that of a previous phase III study, Implant 2, which had demonstrated a statistically significant and clinically relevant improvement in the rate of successful pregnancy at 12 weeks.