Grandmother gives birth to her own granddaughter

The couple had four remaining embryos from a past treatment.

McKissack, who is 28-years-old, called it "the best gift for a lifetime."

A statement released by The Medical Center of Plano said, "Tracey underwent a series of carefully coordinated medical treatments to allow her body to carry a baby once again. One of her daughter's remaining embryos was successfully implanted in April 2015."

McKissack's daughter and Thompson's granddaughter was born Wednesday. Her name, Kelcey, is a combination of her mother and grandmother's names. She weighed 6 pounds and 11 ounces.

In a press conference the hospital aired on Periscope, Thompson gave more detail on the pregnancy. "The second trimester was great," she said. "The first and the third were tough.

"I'm so thankful for the hospital staff. God put us where we needed to be."

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When asked how the family stayed in contact throughout the process, McKissack said proximity helped.

"We live about 20 minutes from each other," McKissack said. "We made sure we were on the same schedules with each other. I went to all the appointments. It was really amazing."

But Thompson wasn't ignorant to the fact that she was an older woman expecting a baby.

"I did get some looks. (People) would look at my belly and then my face and say, 'is that a baby in there?' and my husband would say, 'That's not my baby,' and walk away."

"You have to have fun with it," McKissack said.

Thompson took her role as a surrogate very seriously.

"(My daughter and son-in-law) had been through so much. I didn't want to disappoint them. I was over cautious with everything. (My husband Ben) was over cautious with everything."

Thompson, who has a three year old grandchild from her son and daughter in law, says the family is close.

"We're a very close family. We lean on each other for everything," Thompson said.

The family originally planned on a natural birth, but went forward with a c-section when they baby's heartrate dropped. When Kelcey was born, the entire family was emotional.

"Tears. It was really amazing." Although she was nervous, she was glad the staff encouraged her to watch Kelcey's birth.

McKissack does not plan on hiding the truth from her daughter about how she was born.

"She'll know no different. It will be normal for her. She should know how special and wanted she is."