Seeing that the only maternity pants I had consisted of a pair of jeans, some leggings and some slinky (but pilled) pants, I thought I needed a pair of dressy pants. I found this embroidered stretch velvet on sale and used my favourite pants pattern (again) - this time leaving off the zipper and the yoke and using some black knit fabric for the waistband.
The knees have gone baggy since I have been sitting at the computer, and I have worn the pants all of last night and then this morning.
I do think I will need to add some elastic or something, they slide down slightly when I walk around. I loved how quickly they sewed up.