(1)    Definitions. In this section:

      (a)    “Controlled substance” has the meaning given in s. 961.01 (4).

      (b)    “Controlled substance analog” has the meaning given in s. 961.01 (4m).

   (2)   Testing. Any hospital employee who provides health care, social worker, or intake worker under ch. 48 may refer an infant or an expectant mother of an unborn child, as defined in s. 48.02 (19), to a physician for testing of the bodily fluids of the infant or expectant mother for controlled substances or controlled substance analogs if the hospital employee who provides health care, social worker, or intake worker suspects that the infant or expectant mother has controlled substances or controlled substance analogs in the bodily fluids of the infant or expectant mother because of the use of controlled substances or controlled substance analogs by the mother while she was pregnant with the infant or by the expectant mother while she is pregnant with the unborn child. The physician may test the infant or expectant mother to ascertain whether or not the infant or expectant mother has controlled substances or controlled substance analogs in the bodily fluids of the infant or expectant mother, if the physician determines that there is a serious risk that there are controlled substances or controlled substance analogs in the bodily fluids of the infant or expectant mother because of the use of controlled substances or controlled substance analogs by the mother while she was pregnant with the infant or by the expectant mother while she is pregnant with the unborn child and that the health of the infant, the unborn child or the child when born may be adversely affected by the controlled substances or controlled substance analogs. If the results of the test indicate that the infant does have controlled substances or controlled substance analogs in the infant’s bodily fluids, the physician shall report the occurrence of that condition in the infant to the agency, as defined in s. 48.981 (1) (ag), that is responsible for conducting child abuse and neglect investigations under s. 48.981, and that agency shall offer to provide, or arrange or refer for the provision of, services and treatment for the child and the child’s mother as provided under s. 46.238. If the results of the test indicate that the expectant mother does have controlled substances or controlled substance analogs in the expectant mother’s bodily fluids, the physician may report the occurrence of that condition in the expectant mother to the agency, as defined in s. 48.981 (1) (ag), that is responsible for conducting unborn child abuse investigations under s. 48.981, and that agency shall offer to provide, or arrange or refer for the provision of, services and treatment for the unborn child and expectant mother as provided under s. 46.238. Under this subsection, no physician may test an expectant mother without first receiving her informed consent to the testing.

   (3)   Test results. The physician who performs a test under sub. (2) shall provide the infant’s parents or guardian or the expectant mother with all of the following information:

      (a)    A statement of explanation concerning the test that was performed, the date of performance of the test and the test results.

      (b)    A statement of explanation that the test results of an infant must, and that the test results of an expectant mother may, be disclosed to an agency under sub. (2) if the test results are positive.

   (4)   Confidentiality. The results of a test given under this section may be disclosed as provided in sub. (3).