Here are the possible solutions for they grow when fertilized clue
Answer
Clue
Relevancy
ova
Clue
They grow when fertilized
They're fertilized in biology
They're fertilized
They can be fertilized
They're fertilized, in biology
Definition
OVUM, the female reproductive cell
childstarter
Clue
Fertilized egg?
embryo
Clue
Fertilized egg
Definition
the entity which develops in a woman's womb until it is born as a baby, esp. up to about eight weeks, after which it is known as a foetus, also EMBRYON