Melinda Mostini’s seven-year-old son Leo was born without a left hand and his arm partially missing.
The youngster was delivered at the Lorient hospital, Morbihannaise, in western France in October 2011.
Ms Mostini, who is also mother to 10-year-old Eva, discovered Leo had the defect during an ultrasound scan in June.
After she asked why, doctors reportedly told her: ‘It happens. These are accidents. We do not have explanations.’
And seven years on, medics are still clueless as to what caused Leo’s birth defect.
Melinda Mostini’s seven-year-old son Leo, from western France, was born without a left hand and his arm partially missing (both pictured with her daughter Eva, 10)
Ms Mostini told Le Télégramme: ‘I wish I could give Leo a real answer, just to explain why he has only one hand.’
But the youngster refuses to let his condition hold him back and simply tells friends his hand did not develop in his mother’s womb.
‘Leo has known how to tie his laces since kindergarten. He spent hours on the couch practicing!’ Ms Mostini added.
The youngster, who his mother calls a ‘little fighter’, has been horse riding since he was just four years old, and is a keen cyclist, swimmer and rugby player.
Despite his confidence, cruel strangers still sometimes make nasty comments.
‘Children have the right to be curious but they are sometimes hard,’ Ms Mostini said.
Leo refuses to let his defect hold him back and started horse riding at just four years old. But the keen cyclist, swimmer and rugby player still endures cruel comments
Leo has had his first consultation to have a prosthetic fitted after he did not take to one he was given as a toddler.
As part of the initial investigation into the problem, Ms Mostini was questioned by doctors as to her eating habits during pregnancy and what drugs she took.
However, no common thread was found between her and other affected families.
‘The question arises as to whether it could be environmental’, she told FranceInfo.
Referencing ‘fertilisers, pesticides’, Ms Mostini wonders whether something ‘happened at this time on the commune’.