Molly the French Bulldog from Wandsworth
Molly is a French Bulldog, and is around 31 days pregnant. Only one foetus was obvious on Molly's scan. Posterior to this gestation sac was another shape - probably a kidney - and there was another gestation sac seen, although it appeared to be empty (but healthy - the fluid inside is clear black). Molly's puppy's heartbeat was easily identified, and can be seen in the clip below.