Why did Voldemort wait so long?

[eay50]

No: HPFGUIDX 71530

Okay, this just occurred to me...

In the prediction, Trelawney is clearly referring to a birth that 
will take place in the near future - as opposed to one which has 
already taken place ("WILL be born as the seventh month dies").

So, Dumbledore knew that either baby Potter or baby Longbottom would 
be "the one" BEFORE they were born ie. giving him plenty of time to 
hide them beforehand if necessary.

Pettigrew was made the Potters' secret keeper and we would assume 
that he went straight to Voldemort with their location (I can't 
imagine he would still be alive if he'd hidden this HUGE fact from 
Voldemort).

BUT Harry was born on July 31 and Voldemort came to Godric's Hollow 
on October 31.  What took him so long?????  If he knew about the 
prediction and he knew where the Potters were, I can't imagine that 
he would wait for 3 months to try to kill the only wizard with the 
power to defeat him.

Did Pettigrew not tell him straight away?  Did Voldemort not hear 
about the prediction until the babies were 3 months old?  Were the 
Potters protected by other means as well?  Or were they just left 
unprotected until Harry was 3 months old?

There are about a million directions to go from here.  I haven't 
decided which way to go yet.

Any thoughts, anyone?

EAY