A jealous husband has confessed to slashing his pregnant wife’s neck with a razor blade during sex, police in Brazil said.

Marcelo Araújo, 21, admitted to the murder of 22-year-old Francine dos Santos in December, after they had a row about her becoming pregnant for the third time.

The married couple already had two children, a four-year-old daughter and son aged two.

According to reports Marcelo admitted he didn’t want any more kids as he resented sharing his wife with them.

He also hated the financial burden that was placed on him as a young dad.

Marcelo Araujo killed 22 year old Francine dos Santos

When the suspect was found by police he was covered in cuts to his neck and wrist in his home in Sao Paulo, Brazil.

According to police the 21-year-old had tried to take his own life before they had arrived.

Investigators told the Brazilian online media outlet G1 that the confession came after more than six weeks of interrogation.

During the six weeks the accused gave several versions of what happened on the night of the murder.

Marcelo after being arrested

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According to detectives, the suspect claimed that on December 22 last year, the couple started discussing family plans for Christmas dinner but the talk escalated to a blazing argument about the pregnancy.

Shortly after the disagreement the couple resolved their differences and headed up to their bedroom to have sex.

It was during the intimate session that the suspect apparently stabbed his make-up artist wife with a knife several times before slitting her throat.