Metering for a backlit portrait

I am doing a maternity shoot and want to create a sillhouette of the pregnant woman using a large window as the back lighting and I am just wondering where I should meter?

I sort have got it worked out in my head but just need confirmation.

I intend to meter for the window as then anything else will stay darker.!!

Thankyou!

Meter for the window.

That's what I'd do!

I also heard that you should be on partial metering...read it in a silhouette thread.

I had a try earlier n metered for the window but it didnt seem to go right :S

My light meter seemed to be giving me lots of bizarre readings today anyway.

At least now I know I was actually doing the right thing to start with so maybe just need to master it!!

set your camera to spot meter... focus on the woman, while hold the shutter half way down aim your camera to the bright window and press the exposure lock button, recompose and shoot.