Section 15-9. Protection against dismissal during pregnancy or following the birth or adoption of a child

(1) An employee who is pregnant may not be dismissed on grounds of pregnancy. Pregnancy shall be deemed to be the reason for the dismissal of a pregnant employee unless other grounds are shown to be highly probable. If so required by the employer, a medical certificate of pregnancy shall be produced.
(2) An employee who has leave of absence pursuant to sections 12-2, 12-3, 12-4 or 12- 5, first paragraph, for up to one year, shall not be given notice of dismissal that becomes effective during the period of absence if the employer is aware that the absence is due to such reasons or the employee notifies without undue delay that the absence is due to such reasons. If the employee is lawfully dismissed at a time falling within this period, the notice is valid but shall be extended by a corresponding period.
(3) In the case of an employee who has leave of absence pursuant to section 12-5, second paragraph, or section 12-6 in excess of one year, the first paragraph, first and second sentence, shall apply correspondingly.