The Adipose maintained breeding planets known as nursery worlds, (PROSE: Time Traveller's Diary) as their young were created parasitically by injecting seed into animals. Adipose 3 was such a planet, and after it was lost they tried to convert Earth into one. This attempt failed, though many Adipose children were created. (TV: Partners in Crime)
On 3 January, birth rates would skyrocket across the Adipose nursery worlds as host species tried to stick to their New Year's resolutions to lose weight. (PROSE: Time Traveller's Diary)