Not only is the Bible totally silent about this, but the language of Jesus being conceived as a baby in Mary's womb is made meaningless. Jn.6:60 describes the teaching about the manna as a saying "hard to take in" (Moffatt's Translation); i.e. we need to understand that it is figurative language being used.
Sio tu kwamba Biblia imekuwa kimya kuhusu jambo hili, bali msemo wa kuwa Yesu alizaliwa mtoto mchanga katika tumbo la Mariamu unafanywa kuwa hauna maana. Yohana 6: 60 unaeleza mafundisha yanayohusu mana kuwa ni neno"gumu, ni nani awezaye kufahamu"(tafsiri ya Moffatt): yaani, tunahitaji kuelewa kuwa ni lugha ya kimfano iliyotumika.