Maternal and neonatal covariates to be included for the study
| Neonatal characteristics | Date of ultrasound Gestational age at time of ultrasound (weeks+days) Birth weight (grams) Gestational age (weeks+days) Date and time of birth Date and time of sample collection Feeding status (breast, total parenteral nutrition, formula, nil per os) Packed red blood cell transfusion (yes, no; if yes, date of latest transfusion) Multiple births (yes, no; if yes, baby a, b, c or 1, 2, 3) Low birth weight, intrauterine growth restricted, small- or large-for-gestational age Caesarian section or vaginal delivery (spontaneous or practitioner induced) Presentation at time of delivery Apgar scores |
| Maternal characteristics | Age (years) Body mass index (kilogram per square metre) Parity and gravidity Smoking status Alcohol consumption (if available) Diabetes Hypertension |