Still no kittens, but I felt them move through Lassi's side while I was petting her! There are definitely kittens in there!

Okay. Excitement over. We've been doing a lot of research on signs of impending labor, and a video from Kitty Cat Soul Food has been the most comprehensive source we've found. The signs include:

• Mammary gland enlargement and milk production (can be eight days prior to all the way up to right after the birth)
• Kicking in the litter box
• Behavioral changes
• Excessive licking and grooming, especially the mammary glands and genital area
• Preparing a nest
• Rippling/movement of the kittens (visual and felt, especially prominent after the dropping of the abdomen)
• Loss of appetite 
• Drop in temperature
• Vaginal discharge
• Vocalization and contractions 

A few of these we can't use. It's hard to tell if Lassi's had any behavioral changes since she's a foster and still getting used to her new home. She's also been kicking litter out of the box since she got here, and we haven't exactly been taking her temperature. However, she hasn't been showing any (other) signs of impending labor. Her grooming, as pictured below, is just regular post-food grooming. It's novel to us because she's only recently done it where we can see instead of disappearing into a futon drawer, but it looks like normal cat grooming.

How long until kittens? We have no idea. We'll just keep watching and waiting...