Features many articles and tips on topics concerning large families, including time management, organisation, cooking, outings and celebrations.

Describes a project by King’s College London, with the biggest UK registry of twins used to study the genetic and environmental factors in disease. With details of projects and job opportunities, and guides for researchers and the general public.

A voluntary support group run for and by lone twins.

Independent charity based at Queen Charlotte's and Chelsea Hospital in West London. Features a list of publications available, information on zygosity determination and details of preparation courses for parents.

UK charity providing information and mutual support networks for families of twins, triplets and more. Includes an active forum, fact sheets, parenting advice and listings of regional twin clubs.

Site provides information and resources on multiple births. Includes news and forums.

Portal to information, advice, and support network for twins. Forums and stories also presented.

Site devoted to twins, triplets, and multiple births families in the UK. Includes links to references and online resources.