In reporting any birth or stillbirth, any physician or other person required to make such reports shall state in a report accompanying the certificate whether, according to his knowledge or information, a blood test for syphilis has been made upon a specimen of blood taken from the woman who bore the child for which the birth or stillbirth certificate is filed and the approximate date when the specimen was taken. The Director is authorized to investigate the circumstances surrounding the birth of any baby on whose mother no serologic test, as required by the provisions of this article, appears to have been taken.