CHARLOTTE -- Shaneesha and Raneesha Smith have been best friends their entire lives, growing up as twins in North Carolina. "It was fun, people couldn't tell us apart unless we were standing right next to each other because I’m a little taller than her,” said Shaneesha Smith.

Shaneesha was pregnant when she got surprising news at her ultrasound.  "She was just looking at the screen and looking back at me, and looking at the screen and I’m like what is it? And, she's like I’m just going to go get a second opinion, so she calls in like two more doctors to come in and look at it and I'm like ‘oh my God, what are you going to tell me?’  It's going to be something crazy and she was like we're pretty sure there's three in there,” said Smith.

Doctors say multiple births are rare, but genetics play a role.  "Your mom's side of the family can actually tell whether or not, you are more than likely to have multiples. Some people can have twins and not see twins again until three, four generations later and they have actually found it's not associated to the dad's side,” said Dr. Meagan Morrison of Carolinas HealthCare System.

Raneesha says her sister took on the challenge of having triplets and embraces every second. "It was ridiculous to see how  ‘supermom,’  like just happened overnight,” said Raneesha.

Smith hopes to one day be the grandmother of twins, saying, "I’m hoping my daughters, at least one of them, has twins or if all of them have twins, I’d be just the happy grandparent."