A father and his 18-year-old daughter are suing a Las Vegas fertility clinic after they say a DNA test revealed a mix-up during the in vitro fertilization process.

According to the lawsuit, the father and his wife went to a fertility clinic around 2004 to look for an egg donor after the wife learned she could not conceive. Their daughter was born in October 2006, KVVU reports.

Now around the age of 18, the woman says she used Ancestry.com to learn more about her background. Her father told her about the IVF treatment after the DNA test came back in October 2023.

The results of the test allegedly revealed that the woman’s father is not her biological father, and the egg donor chosen by the couple is not the biological mother.

The father and daughter say they learned she was born from another embryo created by the doctor for a couple whose biological father was a man in Las Vegas.

The father is now undergoing adoption proceedings to legally become his daughter’s father. Her mother died in 2022.

The lawsuit says both the father and daughter suffered extreme and severe emotional upset.

The lawsuit claims the embryo created by the father and the couple’s chosen egg donor could have been implanted in someone else; though the father never gave permission or consent for the embryo to be used by anyone else.