Except in the case of a medical emergency or fetal anomaly, no abortion must be performed or induced or be attempted to be performed or induced unless the physician performing or inducing it has first made a determination of the probable post-fertilization age of the unborn child or relied upon such a determination made by another physician. In making such a determination, the physician shall make such inquiries of the woman and perform or cause to be performed such medical examinations and tests as a reasonably prudent physician, knowledgeable about the case and the medical conditions involved, would consider necessary to perform in making an accurate diagnosis with respect to post-fertilization age.