Establishing the prevalence of communication delays or disorders enables appropriate planning for service delivery and successful implementation of intervention strategies, which may ultimately result in a decline in the prevalence of the disorder.[4] Despite previous efforts [13] to improve early identification of infants with delayed communication development in primary healthcare settings of SA, this practice remains uncommon. [14] Establishing the prevalence of communication delays in infants from underserved communities in SA will, however, advocate for the implementation of early identification and intervention services.An adequate understanding of the prevalence and nature of communication delays in a specific population improves classification of communication delays.[1] Previous research has focused only on speech and receptive and expressive language delays and has not evaluated all the aspects of communication development such as pragmatics and interaction-attachment.[4] Most large-scale prevalence studies have used a broad classification of communication delays, and as a result the true nature of these delays has been obscured.[1] Understanding the nature of communication delays allows predictions that are of clinical and research significance, i.e. early use of gestures predicts later vocabulary development and early word use predicts later social-emotional development. [15] Since there is a dearth of information on the prevalence and nature of communication delays in infants 12 months and younger, the Background. Communication delays are the most common impairment in early childhood and have a negative effect on long-term academic, psychological and social development. Baseline prevalence of communication delays or disorders enables adequate planning of service delivery and successful implementation of intervention strategies, to reduce disorder prevalence. Objective. To determine the prevalence and describe the nature of communication delays in infants aged 6 -12 months in underserved communities in South Africa (SA). Method. A parent interview and the Rossetti Infant-Toddler Language Scale (RITLS) were used to collect data from the caregivers of 201 infants aged 6 -12 months by means of convenience sampling at primary healthcare facilities in the Tshwane district, SA. Results. Thirteen percent (n=26) of infants were diagnosed with communication delay. Associations affecting language delays were established for three risk factors (i.e. housing status, age of mother and number of siblings). The effect of combined risk factors on language development revealed that an infant was at greatest risk (27% probability) of developing a language delay when: (i) mothers were between the ages of 19 and 34 years; (ii) parents owned their own home; and (iii) there were three or more children in the household. Conclusion. The prevalence of communication delays in the sample population was high, possibly because the majority of infants were exposed to risk factors. The implementation of preventive measures such as...