The younger sister of Crown Princess Victoria is set to give birth to a daughter on February 25th, Swedish royal lifestyle magazine Svensk Damtidning reported on Wednesday.
The magazine claims the princess has registered with US-based website Buy Buy Baby ahead of a planned baby shower.
In addition to information about what sort of gifts the coming cousin of Princess Estelle might enjoy, Madeleine's baby registry also reveals that she and husband Chris O'Neill are expecting a girl, according to Svensk Damtidning.
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"Our judgment is that this is correct and has been confirmed by her friends in New York," the magazine's editor, Karin Lennmor, told the Aftonbladet tabloid.
Officials with the Royal Court remained sceptical about the reported baby registry and the due date of the coming royal baby, claiming the information they had put the birth in "early March".
"We're not aware of this site either," Swedish Royal Court spokeswoman Ulrika Näsholm told the tabloid.
However, she neglected to comment directly on the baby's reported gender.
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Svensk Damtidning's reliance on reports from the princess's friends in New York hasn't always proved reliable and up to date, as evidenced when the magazine ran a story about Madeleine's "baby anxiety" over not being pregnant in an edition that went to print just as the pregnancy announcement was made public in September.
Earlier this month, it emerged that O'Neill did not plan to accompany Princess Madeleine to the Nobel Prize ceremonies to be held in Stockholm on December 10th.
"Chris O'Neill was last in Sweden when the king celebrated 40 years on the throne but cannot come to Nobel. He will not be able to attend anything," Annika Sönnerberg, assistant information officer at the Royal Court told Expressen at the time.