Conception
From Bahai9
Human soul comes into being at time of conception, but exact biological moment not known or possibly even knowable[edit]
"The soul or spirit of the individual comes into being with the conception of his physical body."
"the Bahá'í Writings affirm that the human soul comes into being at the time of conception. However, they do not clearly define the exact biological moment and nature of the event described as conception and this may, indeed, be a question that is insoluble by human thought or investigation, since it relates to mysteries of the spiritual world and the nature of the soul itself.
- (On behalf of the Universal House of Justice, 6 February 1997, to a National Spiritual Assembly, at https://bahai-library.com/uhj_compilation_reproduction#12 )
Human soul begins at formation of the human embryo[edit]
"With regard to the soul of man. According to the Bahá'í Teachings the human soul starts with the formation of the human embryo, and continues to develop and pass through endless stages of existence after its separation from the body. Its progress is thus infinite."
- (On behalf of Shoghi Effendi, letter dated December 31, 1937, to an individual believer, in Lights of Guidance, no. 680)