Explosive testimony Thursday morning at the trial of a Winnipeg woman charged with storing infant remains in a storage locker.

Andrea Giesbrecht has pleaded not guilty to six counts of storing infant remains in a storage locker.

A doctor testified the six infants whose remains were discovered in a U-Haul storage locker in October, 2014 were likely born alive.

Neonatologist Dr. Michael Narvey testified the state of decay made it impossible to determine a cause of death.

However, judging from autopsy reports, Dr. Narvey shared his professional opinion in court.

"I believe that some, if not all of these children, would've been born alive," Dr. Narvey said.

Dr. Narvey referenced medical literature in his testimony, and told court the likelihood of a woman having six recurring stillbirths was "extremely improbable."

Dr. Narvey also told court each of the six infants' gestational age was somewhere between 34 and 42 weeks, meaning the babies may have been either full-term or near-term babies.

"There was no evidence of abnormality in these fetuses," said Dr. Narvey. "It would appear these babies were structurally normal."

Giesbrecht has pleaded not guilty to six counts of storing infant remains in a storage locker.

Court heard Wednesday the DNA from each of the six infants shows a strong biological relationship to a female DNA sample collected from a blood-stained sanitary napkin obtained by Winnipeg police from Giesbrecht's home.

The DNA also showed a biological relationship to a male DNA sample labelled in court as "JG."

“That is very strong evidence to support parentage," RCMP Forensic Biologist Christine Crossman told court.