You may experience everything from elation to concern to a sense of being overwhelmed to unrestrained joy. And your feelings may change suddenly and unpredictably. In addition, the mother has just been through quite a bit physically. There's a good chance she'll be exhausted. Both parents may feel some effects of sleep deprivation as well.
Every parent reacts differently.
Some feel high levels of energy driven by the excitement of finally having the baby. Still others feel sad and may experience postpartum depression. Fathers also often feel a measure of sadness or worry. Although some fathers experience elation, others experience fear or a sense of isolation. A physician, nurse, or counselor can help both parents understand their emotions after the baby is born.