A man in his 30s arrested on suspicion of murdering Natalie McNally in Lurgan, Co Armagh has been released on bail.
The 32-year-old was found dead in her home last night. It is understood she was pregnant.
A post-mortem examination will be carried out on the body of Ms McNally tomorrow, but police have described her death as suspicious.
It is believed she suffered stab wounds.
Police forensic officers spent most of today in her home in Silverwood Green, a quiet residential area on the outskirts of Lurgan, and took away a number of items for testing.
Detectives conducted door-to-door inquiries in the hope that neighbours might be able to help their investigation.
Detective Chief Inspector John Caldwell has issued an appeal for information.
"Along with colleagues from the Northern Ireland Ambulance Service, officers attended a property in the Silverwood Green area of Lurgan last night, responding to a report received just after 10pm," he said.
"Sadly, the woman, whom we can now name as 32-year-old Natalie McNally, was pronounced dead at the scene.
"Our investigation is at an early stage and I am keen to establish Natalie's movements between 4pm on Sunday 18 and 10pm last night. I would appeal to anyone with information they feel is relevant to contact us on 101, quoting reference 2127 of 19/12/22."
SDLP councillor Declan McAlinden said people in the area woke up to the news a woman had died.
"We don't know any details as yet, just that police are treating the death as suspicious," he said.
"The young lady is from a well-known and highly respected family within the Lurgan and Craigavon area.
"Speaking with the lady's aunt this morning, she told me on Sunday she was with the family celebrating the excitement of the World Cup final, and her parents got a knock on the door this morning to say their daughter had died.
"At a time when most are looking forward to celebrating Christmas, this family are preparing to bury their daughter. It's really sad."
Additional reporting by PA
