What can I do?my ex girl friend say I'm the father of her 3 month old son I ask her to let me take a home paternitytest but she refused she will not let me see the baby what can I do?

Well the only thing I know 2 do is if u think it is yours c if you can get the la 2 help u!

How can unmarried parents establish paternity?

There are two ways:

The mother, father, child or the State may file a legal action to declare that a man is the father of a child who was born outside of a marriage. This can be done judicially (in court) or administratively and normally involves genetic testing.
Parents can sign a Voluntary Declaration of Paternity form and file this declaration with the Department of Health, Vital Records and Statistics. When a Voluntary Declaration of Paternity form is signed by the child's mother AND father, and the form is witnessed by two individuals that are not related to you and filed with Vital Records and Statistics, paternity is established. If the father is under 18, his parent or guardian must also sign the form.