Forensic expert proves why Diana WASN’T pregnant at the time of her death

A forensic scientist has revealed how she proved Diana wasn’t pregnant at the time of her death in 1997.

In her new book, ‘When the dogs don’t bark: A forensic scientist’s search for the truth’, Angela Gallop, whose professional career spans over 45 years, explains there were two key areas involved in the high profile investigation. 

‘The first was to see if the blood samples taken from Diana contained any of the pregnancy hormone human chorionic gonadotropin (hCG),’ the expert told The Sunday Times

‘The second was to look for any evidence that she might have been taking a contraceptive pill.’  

Many have debated whether Princess was pregnant at the time of the fatal crash on August 31st 1997. Above, Diana pictured leaving the mortimer market centre in London after a briefing by the National Aids Trust

Many have debated whether Princess was pregnant at the time of the fatal crash on August 31st 1997. Above, Diana pictured leaving the mortimer market centre in London after a briefing by the National Aids Trust

Many have debated whether Princess was pregnant at the time of the fatal crash on August 31st 1997. Above, Diana pictured leaving the mortimer market centre in London after a briefing by the National Aids Trust

Above, the photo shown to the jury at the coroner's inquest into the deaths of Princess Diana and Dodi Fayed. It shows the Mercedes wreckage and scene after the crash in the Pont D'Alma tunnel in Paris, which claimed their lives and also killed driver Henri Paul

Above, the photo shown to the jury at the coroner's inquest into the deaths of Princess Diana and Dodi Fayed. It shows the Mercedes wreckage and scene after the crash in the Pont D'Alma tunnel in Paris, which claimed their lives and also killed driver Henri Paul

Above, the photo shown to the jury at the coroner’s inquest into the deaths of Princess Diana and Dodi Fayed. It shows the Mercedes wreckage and scene after the crash in the Pont D’Alma tunnel in Paris, which claimed their lives and also killed driver Henri Paul

In her new book, Angela Gallop (pictured above) has revealed how she analysed blood samples from Diana to see if they contained any of the pregnancy hormone known as human chorionic gonadotropin (hCG)

In her new book, Angela Gallop (pictured above) has revealed how she analysed blood samples from Diana to see if they contained any of the pregnancy hormone known as human chorionic gonadotropin (hCG)

In her new book, Angela Gallop (pictured above) has revealed how she analysed blood samples from Diana to see if they contained any of the pregnancy hormone known as human chorionic gonadotropin (hCG)

The forensic investigation was led by Professor David Cowan, who was head of the department of forensic science at King’s College in London.

Cowan said that blood transfusions received by the princess could complicate the result meaning they had to rely on other methods of collecting the samples. 

She told the Sunday Times: ‘So the best sample for testing was some blood that had been recovered from the carpet in the footwell of her seat in the Mercedes.’     

And while Cowan had began developing a clever pregnancy test that would work on dried blood, Angela took a sample of Diana’s stomach contents to test for any signs of contraceptive residue. 

She revealed that the results were negative meaning that it was extremely unlikely that Diana was pregnant at the time of the crash.  

The Princess of Wales was with Dodi Fayed (pictured above) when the car crashed. Pictured, they walked on a pontoon in the French Riviera resort of St Tropez on August 22, 1997

The Princess of Wales was with Dodi Fayed (pictured above) when the car crashed. Pictured, they walked on a pontoon in the French Riviera resort of St Tropez on August 22, 1997

The Princess of Wales was with Dodi Fayed (pictured above) when the car crashed. Pictured, they walked on a pontoon in the French Riviera resort of St Tropez on August 22, 1997

A pregnant Diana visited the Isles of Scilly in April 1982 when she was carrying Prince William. She is wearing a maternity dress by Catherine Walker

A pregnant Diana visited the Isles of Scilly in April 1982 when she was carrying Prince William. She is wearing a maternity dress by Catherine Walker

A pregnant Diana visited the Isles of Scilly in April 1982 when she was carrying Prince William. She is wearing a maternity dress by Catherine Walker

Diana, The Princess of Wales, pregnant with Prince Harry when she attended a Polo match at Smiths Lawn in Windsor on July 29, 1984

Diana, The Princess of Wales, pregnant with Prince Harry when she attended a Polo match at Smiths Lawn in Windsor on July 29, 1984

Diana, The Princess of Wales, pregnant with Prince Harry when she attended a Polo match at Smiths Lawn in Windsor on July 29, 1984

This reportedly coincided with information offered from Diana’s loved ones that there had been no other evidence to suggest she was pregnant. 

Diana was with her companion Dodi al-Fayed and their driver Henri Paul when the car crashed in the Pont D’Alma tunnel on that fatal night in Paris, August 31, 1997.

It wasn’t until seven years later that Sir John Stevens, the commissioner of the Metropolitan police, was asked to investigate several questions.

These included – was Diana pregnant at the time of her death? Did the blood sample attributed to Henri Paul actually come from him? And was there any valid justification for the elimination of a white Fiat Uno car from involvement in the collision?

A forensic scientist’s search for the truth by Professor Angela Gallop is to be published by Hodder and Stoughton on Thursday, £20 

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