Need Help to fill IMM- 5604 FORM: Non accompanying parent for minor immigrating

[Stylove]

Hi there, here is my situation. I am the principal applicant and immigrating alone. However, I have a 1 year old child. I am not yet married to her mum and we are neither staying together. I plan to get married after having PR and then sponsoring them both. None of them is accompanying me now.

Question: Should she fill out this form? If no, how should I include it in my application? Should I send Child's birth certificate?

Thanks guys and your inputs will be apreciated.