Entries from Brisbane mother Allison Baden-Clay’s diary show her husband’s affair was playing on her mind in the days before her disappearance.

How many times? How were hotels paid for? Do you regret the whole thing or just being caught?

These were some of the questions running through Brisbane mother Allison Baden-Clay’s mind in the days before she disappeared, according to court evidence.

Pages from the 43-year-old’s diary were shown to the jury in her husband Gerard’s murder trial, as it draws to a close.

The final diary entry was dated April 18, 2012, just two days before Baden-Clay reported his wife missing.

The entry, a long list of crossed-out questions and statements, shows her husband’s three-and-a-half-year affair with his former colleague Toni McHugh was playing heavily on her mind.

“How many people in the office knew?” was one question.

“Were you prepared to live with the guilt if I hadn’t found out?” was another.

The mother of three also wrote: “Really hurt – had so many opportunities to tell me”, and “Let me believe it was all my fault”.

The diary entry ended with: “Find whole thing dirty – maybe I’m prudent(sic)? Still get sick in stomach”.

Two days later Baden-Clay reported his wife missing from their home in Brookfield in Brisbane’s west.

And 10 days after that her body was found on a creek bank 13 kilometres away in Anstead, with an autopsy unable to find a cause of death.

Baden-Clay, a 43-year-old former real estate agent, has pleaded not guilty to murder. The 10th day of his trial in the Brisbane Supreme Court also heard that blood found by police in a rear inside panel of one of the couple’s cars was his wife’s.

“The complete DNA profile obtained from the sample matched the reference DNA profile of Allison Baden-Clay,” forensic scientist Amanda Reeves said.

Ms Reeves said that when she examined swabs from the dead woman’s fingernails she found Allison’s DNA and very low levels of possible DNA from a second contributor.

“However these were below the recordable threshold of the laboratory,” she said.

“I didn’t believe that they were suitable for comparison.”

Forensic doctors who examined injuries to Baden-Clay’s face seen the day he reported his wife missing have told the court they looked like fingernail scratches.

It was also revealed on Wednesday that someone connected Gerard Baden-Clay’s mobile phone to a charger at 1.48am on April 20, 2012, even though he had told police he was asleep at the time.

The information was one of almost 30 admissions crown prosecutor Todd Fuller said had been accepted as facts as he closed his case against Baden-Clay.

In recorded interviews with police that were played to the jury, Baden-Clay said he went to bed at 10pm on April 19 and slept through the night.

The jury has heard evidence from 71 witnesses since the trial began on June 10, including relatives of the accused and Allison Baden-Clay, Toni McHugh, and Queensland MP Bruce Flegg, who was friendly with Baden-Clay.

On Thursday, Baden-Clay is expected to be invited to give evidence in his defence but has the right to decline.