LONDON — A woman in London was convicted on Friday over the genital cutting of her daughter, becoming the first person to be successfully prosecuted under the country’s law banning the practice.

The 37-year-old woman was found guilty of committing female genital cutting in August 2017, when her daughter was 3. The girl’s father, 43, was cleared of charges. Neither parent was identified because of reporting restrictions placed on the case.

“Female genital mutilation has an appalling physical and emotional impact on victims that usually lasts their entire life,” said Lynette Woodrow, a deputy chief crown prosecutor, in a statement. “A 3-year-old has no power to resist or fight back.”

A jury in London heard the girl was “deliberately cut and her injuries amounted to F.G.M.,” the statement from prosecutors said, referring to female genital cutting, the practice of a girl’s genitalia being cut and removed.