Saline Enema Administration in Meconium Obstruction of Prematurity and Impact on the Resolution, Feeds, Microbiome, and Gut-brain Axis.

Inclusion Criteria: * Criteria A: For infant presenting with early onset of MOP 1. Birth weight 500 - 1250 gram 2. ≥ 23 weeks gestation 3. No BO for 48 hours 4. BO present but with a small amount or stain of meconium 5. Feeds intolerance or abdominal X-ray showing dilated loops of bowel * Criteria B: For infant presenting with Late onset of MOP 1. Birth weight 500 - 1250 gram 2. ≥ 23 weeks gestation 3. Infants who passed meconium initially and develop evidence of meconium obstruction at a later age (feed intolerance or vomiting and abnormal abdominal X-ray with or without abdominal distension) Exclusion Criteria: Infants that: 1. Neuromuscular disorder 2. Moderate or severe asphyxia 3. Inability to start enteral feeding, which continued for 3 consecutive days before 2 weeks of post-natal age for reasons unrelated to meconium inspissation or its complication 4. Without parental consent 5. Aggravated medical instability 6. Single mothers \< 21 years