In article , Sacha
writes

Can anyone tell me how long it is from frogs mating to laying?!
We've had loads of frogs around but seen no spawn yet.
--

AFAIK, the eggs are fertilised as they are laid, so the male frog clasps
hold of the female and hangs on for as long as it takes - ISTR they can
be coupled for a fortnight.
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/garden/