The case spurred global appeals to call off the beheading of Rizana Nafeek because she was 17 at the time of the killing. Rights groups called the death sentence a violation of international codes governing the rights of minors. She had denied strangling the 4-month-old boy.
A statement Wednesday from the Saudi Interior Ministry said the execution was carried out, but it gave no other details.
Groups such as Human Rights Watch strongly condemned the execution.