Can employees change their mind about when they want their maternity leave to start?

Yes, an employee can change their maternity leave start date provided that they notify the employer of the revised start date at least 28 days before the earlier of the new date and the original date. If it is not reasonably practicable for them to do so, they must provide this notification as soon as is reasonably practicable. The employer can request that notification of any revised date be provided in writing.

The date that the employee selects to start maternity leave cannot be before the start of the 11th week before the expected week of childbirth.