Introduction: Psychomotor development (PMD) reflects the cerebral maturation through sensory, motor and psychological acquisitions of an individual. Its evaluation allows an early diagnosis of delays in order to take care of them. The objective of this study was to determine the profile and explanatory factors of PMD of infants in N'Djamena. Methods: This was a cross-sectional study conducted at the “Notre Dame des Apôtres” Hospital in N'Djamena. It involved 428 infants aged 1 to 24 months received in preventive consultation between October 2017 and June 2018. The Denver II scale was used for the assessment of PMD. Data were analyzed with SPSS 21.0 software. Results: the sex ratio was 1.06. The most represented age group was under 3 months (35.5%). The items of gross motor skills were 95% completed, fine motor skills 93.8%, language 84.6% and sociability 68.8% at the 90th percentile. Development was advanced in 56.8% normal in 32.1% and delayed in 2.1%. Statistically significant differences in PMD were observed according to age group (p= 0.000), vaccination status (p= 0.002), feeding mode (p= 0.000), maternal exchange (p= 0.000) and pregnancy follow-up (p= 0.03). Conclusion: The psychomotor development of N'Djamenese infants is similar to that of other African children, although some variations are noted. It is influenced by certain factors related to the infant and the mother.

Introduction: Hypotrophy is a public health problem in developing countries. Its etiology is multifactorial and it may be associated with high morbidity and mortality. The objective of this study was to describe the epidemiological, clinical and evolutionary profile of hypotrophic newborns at term. Methodology: this was a prospective, descriptive and analytical study conducted in the neonatology department of the MCUH of N'Djamena from 01/06/2018 to 31/05/2019. It involved 109 hypotrophic newborns at term hospitalized. Results: The frequency of hypotrophy was 7.8%, the risk factors were: housewife status (81.7%), low level of education (67%), poor pregnancy follow-up (59.7%), malaria (40.4%), urogenital infections (22%) and anemia (22%) during pregnancy. Hypotrophy was harmonious in 58.7% of cases, the sex ratio was 1.14 and visible congenital malformations were observed in 12.7% of cases. The main reasons for hospitalization were neonatal infections (64.2%), perinatal asphyxia (14.7%) and hypothermia (11.9%). Lethality was 16.5% and associated with multiparity, poor pregnancy follow-up, vaginal delivery, home delivery, pathological Apgar score, notion of resuscitation, existence of malformation, respiratory distress and perinatal asphyxia. Conclusion: Better monitoring of pregnancy, use of family planning by couples, delivery in an institutionalized setting, and reinforcement of the technical platform of the neonatology department will reduce neonatal morbidity and mortality related to hypotrophy.