Filed from 3 published puzzles

EMBRYOS

Set to 3 different clues across 3 published puzzles, most often “Early developments” — The New York Times, Friday, 6 March 2009.

7 letters

Every clue on record, most used first

Early developmentsonce
The New York Times — Friday, 6 March 2009
Biologists' studyonce
The New York Times — Sunday, 5 January 2003
Rudimentary stagesonce
The New York Times — Saturday, 15 April 1995

Other answers to these clues

CELLS5 letters