London: As any parent will testify, potty training a toddler demands time and patience.

But at the age of just six months, Izabella Oniciuc has already mastered the art, her parents claim.

She makes the sound "boo boo" when she needs to answer a call of nature and they then lift her on to the potty.

Experts say it is "extremely unusual" to be so proficient at her age. Most children are at least a year older than Izabella, who is still too young to walk, before they even start potty training.

Mother Raluca, 26, says Izabella has developed a series of other sounds to communicate her needs, including "ah" for mummy, "ger" for daddy and "eh, eh" when she is hungry.

She said: "When Izabella was born, she made a clicking sound for milk, then after a couple of days, the sound developed into "eh, eh" meaning she was hungry.

"Izabella refuses to go in her nappy, I think she doesn't like anything getting on her skin.

"The midwives said I was doing everything wrong, but I just ignored them. Izabella is the happiest baby in the world. She is really something else," the mother said.