As we all know, potty training a toddler takes time, patience and a lot of mishaps along the way.
But at the age of just six months, Izabella Oniciuc is already fully potty trained, her parents claim.
The very advanced baby makes the sound 'boo boo' when she needs to use the potty and they then lift her on to the potty.
Most children are at least a year older than Izabella, who is still too young to walk, before they even start potty training. Many parents and childcarers wait until the child is two or even three before beginning 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.
Her parents first started to notice Izabella was trying to communicate with them when she started making a clicking noise with her mouth when she wanted milk.
Then over the first few months of Izabella's life they made a list of the code sounds and now they say they always know what she wants.
Izabella, who rarely cries, eats when she wants to, sleeps when she is tired and refuses to go to the toilet unless her parents lift her onto the potty.
She even refuses to go in her nappy if she has diarrhoea, and if the couple don't take her then she won't go at all ending up constipated.
Dr Claire Halsey, an NHS clinical psychologist in North Staffordshire, said baby Izabella is 'unusually young' to be using a potty.
She said: "Izabella has got the main components of potty training - timing and communication.
"She is able to communicate when her bladder and bowel are full, which is very surprising at her age - but reasonable.
"I wonder whether she is overly sensitive and does not like the sensation of a wet nappy and that is why she is refusing to go unless she is on a potty.
"Six months is unusually young to be able to communicate and it is also very early for her to be able to make meaningful sounds.
"Babies are desperately trying to communicate with us. Usually they get a few words when they are one year old.
"Izabella is very advanced. She has made a fantastic start to life."
She told news agency SWNS: "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. I am not doing her any harm. She is really something else.
"Mums need to listen to their children – they are not making silly noises, they are trying to communicate with you.
"I speak to Izabella in the same way I speak to adults, not in baby talk. I think she responds well to everything because I've listened to her from birth."
Mrs Oniciuc, a full-time mother from Cheshunt, Hertfordshire, and her husband Finn, 45, a chauffeur, say Izabella has a remarkably calm temperament, which they believe is due to a soothing pregnancy. They played Mozart and read stories to her in the womb.
The couple say Izabella never cries and always sleeps at night.
Mrs Oniciuc said: "One day Finn sneezed in front of Izabella and she burst into tears, which she never does. I told Finn to explain to her he was just sneezing.
"Now because he has explained she does not get upset any more – she understands."
Mr Oniciuc, who has two children from a previous marriage, said it has been 'trial and error' to work out what Izabella's sounds mean.
He said: "It did take us a while, but now we understand her perfectly.
"I am amazed that she is potty trained as it took my other two children until they were at least two-and-a-half.
"I was a sceptic myself, but Raluca was right. Izabella is a very contented baby."
How old were your children when you started potty training? How long did it take?
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