An eight-month-old Canadian baby has been issued a health card without a gender marker, in what could be the first case in the world.

Parent Kori Doty - a non-binary transgender person who identifies as neither male nor female - aims to allow the child to discover their own gender.

The health card has been issued with a "U" in the space for "sex", which could be for "undetermined" or "unassigned".

Kori Doty is fighting to omit the gender from the birth certificate.

The parent gave birth to Searyl Atli in November at a friend's home in British Columbia. Kori Doty, who prefers to use the pronoun they, argues that a visual inspection at birth is unable to determine what gender that person will have or identify with later in life.

They want to keep Searyl's sex off all official records.

"I'm raising Searyl in in such a way that until they have the sense of self and command of vocabulary to tell me who they are, I'm recognising them as a baby and trying to give them all the love and support to be the most whole person that they can be outside of the restrictions that come with the boy box and the girl box," the parent was quoted by CBC as saying.

Kori Doty, a community educator who is part of the Gender-Free ID Coalition, said that those who feel different to the gender designation assigned at birth face several problems later in life trying to change their documents.

"When I was born, doctors looked at my genitals and made assumptions about who I would be, and those assignments followed me and followed my identification throughout my life," Kori Doty said.

"Those assumptions were incorrect, and I ended up having to do a lot of adjustments since then."

In the case of Searyl Atli, the parent said that the authorities have refused to issue the birth certificate without a gender designation and so the parent has applied for a judicial review of the case.

The family's lawyer, barbara findlay, who chooses to spell her name without capital letters, told Global News: "The assignment of sex in this culture is done when a medical person lifts up the legs and looks at the baby's genitals. But we know that the baby's own gender identity will not develop for some years until after they're born."

Canadian media reported that the baby's health card could be the first in the world to not have a gender designation.