I would keep an eye out for the Ovulation swell, It will look like she swallowed a jumbo rat or two and will usually last for around a day then go back down. If you witness this then in 1 1/2 - 2 weeks you should have the "Pre-lay Shed" then in around 30 days from that shed you should get eggs.
I thought that the swell preceeded the "comfort" postitioning? So I figured I just missed it (the swell)because I didn't have her out and it's difficlut to see her in her tub