Anthropometric outcome procedures
Anthropometric data on the infants were collected at all three time points. Infants were undressed and weighed to the nearest 0·01 kg using two standardised digital infant scales (Seca 334 and 727). Recumbent length was measured to the nearest 0·1 cm using an infantometer (Seca 416). Mid-upper arm circumference and head circumference measurements were taken to the nearest 0·1 cm using Seca 201 and 212 measuring tapes, respectively. All measurements were taken in duplicate. If the values of the duplicate measurements differed by more than 0·01 kg for weight, 0·5 cm for length, or 0·2 cm for mid-upper arm circumference and head circumference, a third and/or a fourth measurement was taken, and the two closest values were recorded. In the case where a baby could not lie or sit still, the indirect method was used, where mothers were weighed with and without the infant. The mothers’ height and weight were taken at baseline to assess their BMI. The anthropometric measurements of the infants were converted to LAZ, WAZ, WLZ, MUACZ and HCZ using WHO child growth standard specific for age and sex