There are two types of leave which are often referred to as pregnancy or maternity leave:
disability or medical leave, which consists of the time a woman is unable to perform work because of pregnancy, childbirth and their aftermath, and
Parental leave, which consists of the time after birth or adoption during which a parent (of either sex) cares for the child. When fathers take this leave it is often referred to as paternity leave.
Different legal standards apply to each kind of leave.