The smallest and youngest premature babies ever born weighed about half a pound, the size of a small cell phone, and were born about 4 months early.
Smallest and Youngest Preemies to Survive - Human Defense
Very premature babies at risk of mental health problems – research, Psychology
Tiniest Baby of 2019 Beats Odds to Become Busy Toddler - Stanford Medicine Children's Health BlogHealthier, Happy Lives Blog
World's smallest baby girl goes home from the hospital
World's smallest known baby at birth, who weighed 7.5 ounces, leaves hospital
Preterm birth - Wikipedia
Study finds youngest preemies at significant risk of neurodevelopmental problems
One Of America's Smallest 'Micro Preemie' Babies Discharged From Hospital
Born at just 21 weeks, one of the world's youngest surviving premature babies now flourishing
Born weighing about as much as “a large apple,” Saybie is the world's smallest surviving baby – The Denver Post
World's most premature twins to turn 2 in Iowa: Guinness World Records