The natal ceremony of a male person is performed even before the severance of the navel chord. On that occasion his mother is designated Savitri and his father Acharya (priest).
प्राङ् नाभिवर्धनात् पुंसो जातकर्म विधीयते। तत्रास्य माता सावित्री पिता त्वाचार्य उच्यते॥