Would it be possible for you to post pictures of her belly?

That does sound suspicious.  In Bronwen's last 11 days of pregnancy she gained 97 grams.  So I would say that she IS pregnant.  Sorry.

Have you ever dealt with a pregnant rat before?  She needs to be in her own cage (aquarium, small spaced wire cage, tupperware cage, or a wire cage with a deep plastic base.  You have to start feeding her a lot more and higher on the protein to help feed the bubs she is carrying..etc.

You separate at 5 weeks, but by then the males should have obvious testicles while the females do not. 

Thank you, five weeks it is then.  It's good to know.  Thank you for the pictures and the support.  Sincerely, Anne

I myself had a nasty scare and thought I got a pregger girl, she put on weight, and had a VERY fat and tight belly, but she wasn't pregnant, just a bit of an eater  after quarenteen time, I moved her in with my two other ratties and though she's 5 months younger, she's almost as big as they are, and much denser than the other two  so maybe you just have yourself a bigger girl like I did, best of luck either way though!

Your photos are cute.  Yes, I was just looking at my girl.  I was holding her and feeling her belly...and I'm probably imagining this but I have just about convinced myself that I can feel a couple of individual babies protruding out the side.  She is so cute, black and white Variegated.  I placed her back in her cage and I watched her clean my cooties off her.  She is so big she topples over when she gets off balanced.  When she finished grooming, she decided to take a nap, and so she just slouched against the wall belly up and exposed.  Like ...Good lord, just bring me a Pina Colada while I rest my head for just a minute.  She is cute, but I certainly wasn't planning on being an expectant mother.   

Congratulations

I'm very sorry for your losses, I hope the rest have better luck.   
I can't offer any advice but hopefully someone can help.

I am so sorry to hear about your babies! It is very sad.

Even more sad is that it sounds like mama isnt lactating. With some babies already dead and the remaining not eating, it seems it is the fate of the whole litter.

You can try feeding yourself but it is very difficult with newborns especially if they havent gotten to nurse off mama first.

here are a few links you can go through to help you try to save the remaining few.

http://www.ratfanclub.org/orphans.html
http://www.afrma.org/rminfo8.htm
http://www.fatratcentral.com/pages/reproduction/orphan.htm
http://www.rmca.org/Articles/orphans.htm

also check to make sure they have milk bands...you can see the milk through their skin on their tummys...so if you see a patch/band of white in their stomachs...that means they are eating.

i got 2 females from a pet store and 1 was pregnant... luckily everything went well because i didnt know much about rat babies. There was a stillborn baby though i kept the two females together and the "aunt" helped take care of the babies a lot because the mom is blind and she got tired of nursing them all the time. Now the babies are about 4 weeks old and it makes me so sad that they will be leaving me in a week 

I hope your babies will be ok...

Oh, I'm so sorry about the babies.  At least now the mama is with you, she won't have to go through that again. 

Chaos, just in case she forgets to update, she mentioned in Chat that one of the babies survived and even has a milkbelly!!  Mom is trying to be a good momma and its a big eeper.  Lets keep our fingers crossed.  I wonder if she had a difficult birth and too much time passed for the first babies before feeding?  Maybe that surviving baby was her last and there was less time before she fed it?

Oh, so sad.  I hope her one baby left turns out to be a girl, so they can stay together.