An update on Abby and Erin Delaney, who were born conjoined and separated at Children's Hospital of Philadelphia (CHOP).

After a prenatal diagnosis, the Delaney twins were born in July 2016 at CHOP's delivery unit for babies with birth defects. At 11 months of age, they were separated during a long and complex surgery.

In all, they spent 485 days in the hospital. Now more than 2, they are home and making amazing strides in their growth and development.

The team at CHOP was led by Greg Heuer, MD, PhD, a pediatric neurosurgeon, and Jesse Taylor, MD, a pediatric plastic surgeon.

When the girls are 35 years of age, the surgeons will bring them back to the operating room for skull reconstruction and additional plastic surgery.