"The bottom line is that no chemical that persists in the environment should be introduced in the first place," experts said.
Chlorpyrifos is a widely used chemical product used on a variety of crops such as soya beans, alfafa, citrus, almonds, cotton, grapes and walnuts.
Officials found the mysterious remains during a routine aircraft inspection.
"Where D.C. is unclear, we're going to be very clear here in Texas," said Texas Senator Lois Kolkhorst.
The four fetuses were found sitting in liquid that contained brain tissue.
Researchers developed extremely premature lambs to maturity and say the technology could be used to treat human babies in a decade.
Dynel Catrece Lane, 35, was also found guilty in a Boulder courtroom of a charge of unlawfully terminating a pregnancy stemming from the March 2015 attack.
The top court affirmed an appeals court judge's opinion that "the state cannot commandeer the doctor-patient relationship to compel a physician to express its preference to the patient."
The decision that made waves in 1973 is now a political tsunami.