Arthur and Molly -- How old are they?

[Arya]

No: HPFGUIDX 97370

<Snipped stuff about ages/references/etc>
Geoff said:
My only problem with them [Arthur/Molly] being between 65 and 73 in 
1995 is that would put them at 51 to 59 when Ginny was born and 
between 50 and 58 when Ron arrived.

That could be reasonable for Arthur but, unless there are different 
biological "clocks" for witches, it's extremely late for someone to 
carry two children within a year or so of each other.
---------

Arya now:  
I think that *is* a reasonable thing to assume, actually.  Since we 
know McG is still considered 'sprightly' at 70-ish, Dumbledore is 150-
ish and can still kick some Volde-arse and Professor Marchbanks is 
old enough to have examined Dumbledore in Charms and Transfiguration 
herself, then I think it's very safe to say magical people are on a 
very different biological scale.  They live longer; why not assume, 
like us muggles, that they can reproduce for up to about half their 
life expectency?  I'd accept it.  

The thing that, in light of the age-expectancy of a wizard/witch, 
seems weird to me, is why would Lily and James get married and have a 
kid so early in life?  I mean, they would have been about 20-23 when 
Harry was born--that's seems a bit young to me when you live to be 
150+.  Then again, maybe I'm just assuming they PLANNED to get 
married and get pregnant...  Harry did wonder why his mum ever 
married his dad?  Maybe she got knocked up after a drunken night of 
Firewhiskey?  Nah, nevermind, Sirius and Remus tell us in the 
conversation by Floo that James and Lily started dating in 7th year.  
Nevermind.  There goes my Marriage of Necessity Theory.  <g>

Arya