How early managent need to be reported regd maternity leave

[Momo]

Hello,
I am working in PSU since a year. My probation period is completed very recently, however confirmation formalities are ongoing. Technically, I am still under probation.
I am 11 weeks pregnant expected due date is in September 2017. Is there any rule that by how many weeks of pregnancy management should be informed regd maternity leave.
I have checked our HR manual, it doesn't state anything regd the same.

[Kalkifashion]

That precisely depends upon the advice of your doctor or physician who can advise you the precise date from when to apply for a maternity leave in order to avoid complications during the delivery. I am a novice in this matter, therefore suggest you to visit a doctor.