Only once was I ever present to watch a litter being born; many times I've been close to seeing them. Females seem to be able to hold off while the lights are on. first comes the lightening, where the whole mass compresses and moves down, then the water breaks, and then it all happens very quickly, most of the time, I guess. Babies start coming at abut one or two minute intervals.
Oh, yes! But, in my case, it was more of a necessity to the line I was developing. I really, really, really wanted the litter as it was essential to my fawn and red satin lines, and the doe in question had munched her first litter. I hovered nearby when she seemed to be close to delivery, and managed to save about five out of the seven. I had to take them straightaway before she had a chance to get a hold of them, so I ended up removing the sac and afterbirth and stroking with a dampened finger to get them to start breathing, after which they were fostered on another doe who was experienced at fostering and ready to take another litter. It was quite an experience.