Referring to the prophetic dream Queen Maya had prior to conception, the life story of the Buddha according to the Pali Canon say that his mother did not engage in sexual activity or entertain any thoughts of other men during her pregnancy.
It does not say that Siddhartha was conceived without sexual activity between his parents.
However, some parallels have been drawn with the birth story of Jesus.

Z. P. Thundy has surveyed the similarities and differences between the birth stories of Buddha by Maya and Jesus by Mary and notes that while there may have been similarities, there are also differences, e.g. that Mary outlives Jesus after raising him, but Maya dies soon after the birth of Buddha, as all mothers of Buddhas do in the Buddhist tradition.
Thundy does not assert that there is any historical evidence that the Christian birth stories of Jesus were derived from the Buddhist traditions, but suggests that "maybe it is time that Christian scholars looked in the Buddhist tradition for the sources of the idea".

Other scholars have, however, rejected any influence, e.g. Paula Fredriksen states that no serious scholarly work places Jesus outside the backdrop of 1st century Palestinian Judaism.
Eddy and Boyd state that there is no evidence of a historical influence by outside sources on the authors of the New Testament, and most scholars agree that any such historical influence on Christianity is entirely implausible given that first century monotheistic Galilean Jews would not have been open to what they would have seen as pagan stories.
Referring to the prophetic dream Queen Maya had prior to conception, the life story of the Buddha according to the Pali Canon say that his mother did not engage in sexual activity or entertain any thoughts of other men during her pregnancy. It does not say that Siddhartha was conceived without sexual activity between his parents. However, some parallels have been drawn with the birth story of Jesus.
Z. P. Thundy has surveyed the similarities and differences between the birth stories of Buddha by Maya and Jesus by Mary and notes that while there may have been similarities, there are also differences, e.g. that Mary outlives Jesus after raising him, but Maya dies soon after the birth of Buddha, as all mothers of Buddhas do in the Buddhist tradition. Thundy does not assert that there is any historical evidence that the Christian birth stories of Jesus were derived from the Buddhist traditions, but suggests that "maybe it is time that Christian scholars looked in the Buddhist tradition for the sources of the idea".
Other scholars have, however, rejected any influence, e.g. Paula Fredriksen states that no serious scholarly work places Jesus outside the backdrop of 1st century Palestinian Judaism. Eddy and Boyd state that there is no evidence of a historical influence by outside sources on the authors of the New Testament, and most scholars agree that any such historical influence on Christianity is entirely implausible given that first century monotheistic Galilean Jews would not have been open to what they would have seen as pagan stories.
Maya (mother of the Buddha)