| Clue | Source | Date |
|---|---|---|
| One studying organisms in very early development | The Times Concise | 21 May 2026 |
| Expert in early development | The Times Concise | 01 Jan 2022 |
| Bert is gloomy -- medical expert sorts that out | The Telegraph Cryptic | 24 Aug 2018 |
| Expert in the first stages of life | The Times Concise | 01 Jun 2017 |