Historical clue formulations

• Post-embryo stage — 2025-01-19
• Image in a sonogram — 2020-08-25
• Early stage of development — 2018-08-31
• Ultrasound target — 2017-10-22
• Internal development? — 2014-05-03
• Baby-to-be — 2011-08-22
• Womb contents — 2006-09-06