Dallas —

A California couple in an escalating fight with their surrogate over a newborn with a life-threatening heart defect has told a Texas court the child’s condition has worsened and they are anguished by attempts to deny them parental rights because they previously wanted an abortion.

“He’s our child,” Nausheen Gilkar said Tuesday, wiping away tears on the witness stand.

“She’s unstable,” Gilkar said of surrogate McKenna West, who was sitting across from her in the Dallas courtroom. “She’s trying to take him from us.”

The hearing offered the fullest public airing to date of a deepening and high-profile dispute over surrogacy and abortion that has rushed right-to-life groups and GOP officeholders to the side of West, a nurse who flew from Alaska to have the baby on August 12 in Texas, where most abortions are banned.