My LPR mom petition for me as minor child but my birth certificate was late registered hope that wouldn't make things difficult or complicated?

You have made the same inquiry on multiple occasions. As I previously stated, a birth certificate is typically sufficient evidence of the mother-child relationship. However, given your birth was registered late, you may be asked to provide additional evidence to establish the relationship or even to provide DNA test results. If you are concerned, consider working with an attorney. You can read more about family immigration at http://myattorneyusa.com/family-immigration.