Buzzfeed.com lists several ideas for maternity photo shoots under it's DIY section as of 2015. Pinterest.com shows many ideas from subscribers who list and show their own maternity photos, and TheDatingDivas.com lists 50 ideas for maternity photography inspiration.
The ideas from all the websites can be reproduced as is or serve to inspire prospective mothers and their families. Both Buzzfeed and The Dating Divas show relatively small numbers of ideas, but you can expand upon these by customizing an idea to your particular goals and circumstances. Pinterest listed over 220 photos on the Maternity Photoshoot Board in late 2015, greatly expanding the potential for generating customizable ideas.