Yes, to your first question, the Act states that "woman" means a woman employed, whether directly or through any agency, for wages in any establishment.
Maternity Leave for Premature Births
If the baby is premature, the section states the following: A woman suffering from illness arising out of pregnancy, delivery, premature birth of a child, [miscarriage, medical termination of pregnancy, or tubectomy operation] shall, on production of such proof as may be prescribed, be entitled, in addition to the period of absence allowed to her under section 6, or, as the case may be, under section 9, to leave with wages at the rate of maternity benefit for a maximum period of one month.