He was ordered to spend at least 12 years in jail.
The woman, who was 29 weeks pregnant, was attacked in the street on 29 May 2020, and needed hospital treatment for multiple injuries.
The baby was found to have died following the assault on its mother, whose injuries included a bruise the size of a fist on her abdomen and a fractured eye socket.
Witnesses saw Davison kicking the woman and “treating [her] like a dog”, she said.
‘Violent and controlling’
Davison was also found guilty of assault occasioning actual bodily harm and perverting the course of justice for offences carried out later in 2020.
Representing himself via video link at the sentencing hearing, he said he had not had a fair trial and “never had intentions of killing anyone”.
He left the video link during the course of the hearing.
Passing sentence, Mrs Justice Cutts said Davison’s “resentment had simmered and exploded into violence” in May 2020.
She told Davison he had a “violent and controlling nature” and his victim had been “heavily pregnant and vulnerable”.
He was ordered to spend a minimum of 12 years in jail, less the 475 days he has already spent in custody, before being considered for parole.