Each infant must travel with a separate adult. Hence number of infant travellers cannot be more than the adult travellers that are allowed in one booking on qatarairways.com. Infants are not permitted to travel with unaccompanied minors, minors, and children.
Contact your local offices for further enquiries. Contact details can be found in the following link https://www.qatarairways.com/en/worldwide-offices.html