Astanga Hrudaya
हर्षयेत्तां मुहुः पुत्रजन्मशब्दजलानिलैः। प्रत्यायान्ति तथा प्राणाः सूतिक्लेशावसादिताः॥८२॥
she should be made happy often uttering words such as “son is born”; by water (drinking, sprinkling etc) and air (fanning) by these her life (strength) returns and she gets relieved of the exhaustion of delivery
english translation