Historical clue formulations

• Prenatal tests, in brief — 2024-02-25
• Prenatal procedures, for short — 2023-06-12
• OB/GYN tests, informally — 2022-12-06
• OB/GYNs perform them — 2012-01-23
• Prenatal procedures, informally — 2010-04-25
• OB's perform them — 2010-01-15
• Short medical procedures? — 2000-01-01