Three hundred and forty-seven mother-infant pairs attending a well baby clinic in a University Hospital in Riyadh were interviewed on the type of feeding given to their infants. The objective was to assess the latest trend of infant feeding practices in an urban population and to compare present trends and their significance with previous reports. Results showed that 32.4 per cent of infants at 3 months and 22.1 per cent of infants at 6 months were exclusively breastfed; 18.2, 48.4, and 65.4 per cent were exclusively bottle fed at 3 months, 6 months, and 1 year respectively. Weaning foods were added between 3 and 6 months to a very high percentage of infants. Insufficient breast milk and refusal of breast by the infant were among the most common reasons for introduction of bottle feeds.

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We investigate the exact travelling wave solutions of the Tzitzéica-Dodd–Bullough–Mikhailov (TDBM) and Tzitzéica-type (TT) equations, appear in nonlinear optics, using simple ansatz approach. We use the Painlevé and traveling wave transformations to convert the mentioned nonlinear equations into nonlinear ordinary differential equations. Then, the simple ansatz approach has been employed to procure wave solutions, in terms of bright, singular soliton and trigonometric functions, for the Tzitzéica-Dodd–Bullough–Mikhailov (TDBM) and Tzitzéica-type (TT) equations. The study shows that the simple ansatz approach is straightforward and easy to implement for solving nonlinear problems.