Hi, Mr. Verma,
CL, SL, or any other leave such as PL, Paternity, or Maternity Leave is not granted during probation for a reason that the probation period is meant to judge the suitability of an employee for a given position. If leave is considered, the whole process gets defeated, hence generally not given.
You must also know an alternative view as well. Some companies do consider granting SL on compassionate grounds but on a pro-rata basis, considering the period of employment/eligibility/quantum, etc. PL is since based on the previous year's employment, generally not given. CL is considered on completion of probation. However, all leave - PL, SL, CL, etc., are calculated from the effective date of probation.
Regarding Paternity or Maternity Leave, the same is given after a specified period as per the company's policy - more specifically, Maternity Leave is given provided any woman employee works for a minimum of 80 days in a company, whereas Paternity Leave is given in very few companies, including IT and BPOs.
These are a few points that would give you some clarity on various aspects of Leave management and may be helpful, I believe.
Regards,
Rajpal