Also called as Santhana Gopala Mantra, the following mantra has to be chanted 108 times a day till the day of delivery.
Om Devaki Sudha Govinda Vasudeva Jagath Pathe
Dehimey Thanayam Krishna Thwamaham Saranam Kadhahaa
Deva Deva Jagannatha Gothra Vridhi Karap Prabho
Dehimey Thanayam Sheegram Ayushmandham Yashashreenam