Lawmakers in New Hampshire and Vermont are considering measures to terminate a parent's rights to a child if the child was conceived as a result of rape and the parent is convicted of the sexual assault under a bill before a Senate committee.

The bills would expand state laws to require courts to grant petitions terminating the rights upon conviction or a guilty plea or if a fact-finding hearing determines the child was conceived as a result of sexual assault.

Shauna Prewitt, a rape victim and national spokeswoman on parental rights, is expected to testify in both states on Tuesday.

Advocates for the measure say between 25,000 and 32,000 women in the U.S. become pregnant as a result of rape every year but only 8 percent of rapes are prosecuted.