Two obstetricians who attempted to resuscitate a woman who bled to death hours after giving birth did not see an 8cm laceration inside her vagina while treating her for the sudden massive bleeding. Andrew Yu, a private obstetrician, told the second day of an inquest at the Coroner's Court that he did not notice any tear on Livia Chui Wai-yan, 36, even when he was conducting an emergency hysterectomy at Adventist Hospital as a result of the bleeding. He said he did not have a chance to open the vagina to check until after Chui's condition had deteriorated. Robert Stevenson, a private obstetrician who was at the hospital when Chui started haemorrhaging and attempted to resuscitate her, wrote in a report later that he also had not noticed a vaginal tear. The laceration was 8cm long and 3cm deep, the court heard. Chui's inquest is being held before Coroner Michael Chan Pik-kiu, with Dr Yu and Dr Stevenson testifying to the court. Chui was admitted to Adventist on January 9 to give birth several weeks ahead of full term because Dr Yu, her obstetrician, was worried the baby would be too big for vaginal birth if she waited. Hours after giving birth to a healthy baby girl, blood suddenly shot from Chui, covering the curtain and wall in her ward and her bed sheets. Dr Stevenson estimated she lost 2.5 litres of blood. It kept flowing, and despite the two doctors' attempts to stop it, she died, the court heard. Dr Stevenson said he diagnosed uterine atony when he saw the amount of blood Chiu had lost because he knew it caused 70 to 80 per cent of post-birth haemorrhages. Uterine atony is a loss of contraction in the uterine muscles, which compresses blood vessels. Dr Yu agreed uterine atony was a factor but said the main cause of death was amniotic fluid embolism, which prevents blood from clotting. The inquest continues today.