Related Clues:

• Former embryo
• Certain unborn young
• Womb contents
• Future embryo
• One receiving womb service?
• Embryo
• Womb occupant
• Baby-to-be
• Early stage of development
• What an embryo develops into
• Embryo's successor
• What a womb contains
• Internal development?
• Ultrasound image, perhaps
• One in utero