Jess, 31, and Chris Chelin, 34, from York were completely shocked to have twins
They spent over three years trying to conceive and undergone 2 rounds of IVF
Had a two-year-old daughter called Ayda by intra-cytoplasmic sperm injection
Conceived the non-identical twins naturally and were born this January
Eric was born on January 19 while Albert was born later on January 20