Iowa Code § 600B.9: Time of instituting proceedings.

The proceedings may be instituted during the pregnancy of the mother or after the birth of the child, but, except with the consent of all parties, the trial shall not be held until after the birth of the child and shall be held no earlier than twenty days from the date the alleged father is served with notice of the action or, if blood or genetic tests are conducted, no earlier than thirty days from the date the test results are filed with the clerk of the district court as provided under section 600B.41.