PLE-4293

A 35-year-old G1P0 woman at 37 weeks of gestation with a history of chronic hypertension presents with severe abdominal pains for several hours. Her blood pressure is 140/90, pulse rate is 110, respiratory rate is 18, and temperature is 37°C. She has a tender abdomen and her cervix is dilated to 4cm with bulging membranes. The cardiotocography (CTG) is non-reactive with hypertonic contractions. What is the diagnosis?