"An amicus curiae (literally, "friend of the court"; plural: amici curiae) often referred to as amicus brief is defined as the legal brief where someone who is not a party to a case assists a court by offering information, expertise, or insight that has a bearing on the issues in the case. The decision on whether to consider an amicus brief lies within the discretion of the court. The phrase amicus curiae is legal Latin and its origin of the term has been dated back to 1605-1615. The scope of amicus curiae is generally found in the cases where broad public interests are involved and concerns regarding civil rights are in question." (From Wikipedia)
One of the legal briefs accepted by the Supreme Court in the Dobbs case regarding abortion rights concerned the following.
(From the brief.)
"Amici curiae are biologists who work at colleges, universities, and other institutions in 15 countries around the world.
The fertilization view is widely recognized—in the literature and by biologists—as the leading biological view on when a human’s life begins... An international survey of academic biologists’ views on when a human’s life begins reported 96% of 5,577 participants affirmed the fertilization view.
Fertilization, generally, marks the beginning of a sexually reproducing organism’s life and, specifically, marks the beginning of a human’s life, as it is the point at which a human first comes into physical existence as an organism that is biologically classified as a member of the Homo sapiens species."
When someone asks me why I am against abortion, my response is: Because I am against killing an innocent, defenseless human being.