– https://www.babycentre.co.uk/a127/caring-for-your-babys-umbilical-stump
– https://www.healthline.com/health/parenting/baby-belly-button#TOC_TITLE_HDR_1
– https://www.mayoclinic.org/healthy-lifestyle/infant-and-toddler-health/in-depth/umbilical-cord/art-20048250
– https://raisingchildren.net.au/newborns/health-daily-care/hygiene-keeping-clean/umbilical-care
– https://www.whattoexpect.com/baby-growth/umbilical-cord-care.aspx