Possible Clues:

• Cell with human potential
• It grows when fertilized
• Cell with 23 unpaired DNA strands
• Man United forwards resurgent after 0-5, showing a bit of life potentially
• Antony's egg
• Mother's basic contribution, boundless love? I'm not sure
• Possible future embryo
• Egg, to Cato
• It came before the pullus in ancient Rome ... or did it?
• Fertility doctor's focus