Possible Clues:

• One's first home
• Ultrasound focus
• Organ certain to turn up under urologist's coat
• The 'oven' in 'have a bun in the oven'
• Where we all began
• Human's first home?
• Place to become a part of humanity
• Latin for 'womb'
• States true version up front: 'It was one's first abode'
• After operation, suture organ