An inquest into the death of a one-year-old who "was always happy" was opened on Wednesday (January 5).
The hearing will finish on Thursday (January 6) when evidence will be heard from all witnesses after the sudden death of Emmett Jago Rathband.
The inquest was told he was diagnosed with Down's syndrome, suspected sepsis and other chronic respiratory problems following his birth on February 5, 2020.
Shortly after he was born, his mum had "a great deal" of work reaching out to paediatricians and specialists over concerns about his breathing, the inquest has heard.
His mum Latoyah Ibbeson, 21, said her baby son had breathed noisily in his sleep, and would occasionally "gasp for air".
Emmett was described as a "playful and smiley" baby who was taken to regular consultations with Dr Victoria Walker of Sherwood Forest Hospitals.
Dr Walker told the inquest that "concerns were raised by the family over his noisy breathing", and so he was referred to Dr Yanney from the same medical trust for a sleep study at the King's Mill Hospital.
The results were reported on February 15, and the conclusion was that Emmett was suffering from an obstructive sleeping disorder.
He was referred to respiratory specialists at Nottingham University Hospitals Trust, where he was consulted on two occasions in April time.
The inquest heard that further investigations were due to take place at the Queen's Medical Centre in October this year.
However, baby Emmett was found dead in his cot at home in Alexandra Street, Kirkby-in-Ashfield, on May 2 last year, when his mum, Ms Ibbeson, went into his room at around 11am - a time when he would usually be awake.
The baby was found "cold and unresponsive", the moment when the ambulance was called, the inquest heard.
He was pronounced dead at 11.45am.
A pathological examination into his death revealed that Emmett had a vascular anomaly and other complications that caused him airway obstruction.
Dr Elizabeth Didcock, assistant coroner for Nottingham and Nottinghamshire, will conclude the inquest with NUH witnesses Dr Preyell and Mr Daniel due to speak in the hearing.
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