01/28/2015 11:22 EST | Updated 03/30/2015 05:59 EDT

Greg and Elaine Smith issued birth certificates for surrogate-born twins

A B.C. couple who have been fighting to bring their surrogate-born twins home from Mexico has been issued birth certificates for the premature babies.

Greg and Elaine Smith's twins were born prematurely earlier this month after using a paid surrogacy clinic in Mexico. The couple are now trying to bring the babies back to Vancouver to receive care at B.C. Children's Hospital.

Greg's aunt Linda Pruden said the couple has just cleared one hurdle 

"We heard last night that they had the birth certificates," Pruden told The Early Edition's Rick Cluff.

The couple now needs to go to the Canadian embassy to get the twins Canadian passports.

Pruden said baby Ayden should be well enough to travel within a few days, but his twin Ariana is still in critical condition. She said the Smith's will stay in Mexico until Ariana can travel before making the trip home.