"Ovum," is the egg, the fruit of Mary's womb - Jesus. In Christian tradition there exists what is called the 'O Antiphons of Advent.' They are musical pieces that have been sung since the 8th century that draw on the imagery of the hope of the coming Christ. 
 
The repeated use of the imperative - "Come!" embodies the longing of all for the Divine Messiah. Listen at bar 45 for the 6 measure reference to the hymn - "O Come, O Come Emmanuel," summoning forth Christ in the egg.
 
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