PLANO, TX — Kelley and Aaron McKissack had been trying to have a baby for more than three years, with multiple infertility treatments and three miscarriages.

With four remaining embryos after the final round of In Vitro Fertilization, the couple got an offer to carry their child from someone very close to them.

Kelley called it "the best gift…for a lifetime."

Tracey Thompson, 53, gave birth Wednesday to her daughter's child , a 6-pound, 11-ounce girl, at The Medical Center of Plano.

Tracey was seven years past menopause, a story on the hospital's website says, "but in otherwise excellent health."

She had to undergo "a series of carefully coordinated medical treatments" to be able to carry her daughter's baby.