Los Angeles: A Los Angeles judge has pushed back the deadline for Anna Nicole Smith to determine the father of her baby as part of a lawsuit by an ex-boyfriend, a lawyer for the former Playboy Playmate said on Wednesday.

The judge postponed a required paternity test for Smith's daughter, Dannielynn Hope Marshall Stern, because a doctor assigned to collect the DNA sample did not have the required work permit for the Bahamas, attorney Ronald Rale said. The judge set a new hearing for Feb. 7.

Smith gave birth to the baby girl in the Bahamas on Sept. 7 and several weeks later married her personal lawyer, Howard K. Stern, saying he was the father.

Her ex-boyfriend, Larry Birkhead, sued Smith in October, claiming he was the father and demanding a paternity test.

Los Angeles Superior Court Judge Robert Schnider ruled in Birkhead's favor and gave Smith until Jan. 23 to provide samples of the baby's DNA.

Smith's 20-year-old son, Daniel, died in the Bahamas three days after the birth of her daughter. A pathologist hired by the model said he apparently died from a drug overdose.