Why my baby's teeth grew with irregular formation? will they effect the permanent teeth in the future?

Not necessarsily: Some irregular formations have a genetic program. Others do not. It depends on what the irregular formation is. If it is developmental, then it should have no impact on the adult teeth. If it's a genetic cause, it might.

Malocclusion: If your term "irregular formation" means malocclusion, then the eruption pattern and position of the teeth was genetically determined. Please have your child monitored by a local dentist as the secondary teeth erupt. Your child may need orthodontic care when the appropriate age.

Enamel defect: The condition can affect baby teeth and adult teeth. The good news is a treatable condition by a pedodontist.

Irregular formation: Not sure what you mean by "Irregular formation ". Do you mean the teeth are shaped unusually, they are crowded, or the are erupting in an unusual pattern? Regardless, the best way to get an answer to your question is to have your baby examined by a pediatric dentist

No: no, irregularities in baby teeth generally do not effect or contribute to issues with permanent teeth. Now I do agree that certain syndromes do present issues in both baby and permanent teeth but if you have concerns please visit your local dentist to help yo with your concerns if needed.