worlds 1st artificial womb | Scientists successfully developed a lamb inside of a bag

Scientists successfully grew fetal lambs inside 'uterus-like' bags
Doctors at Children's Hospital of Philadelphia have developed a new artificial womb that could benefit the tens of thousands of critically preterm (younger than 26 weeks) births in the US each year. According to a new paper published in the journal Nature Communications, the research physicians successfully kept fetal lambs alive inside a "uterus-like" plastic sack for up to four weeks -- longer than any similar device before it.
The concept behind the new artificial womb is fairly simple: fetal lambs were placed inside a soft, temperature-controlled plastic bag filled with amniotic fluid to mimic a real uterus and their umbilical cords were hooked up to a blood oxygenating machine. Unlike previous devices, however, the Philadelphia team's artificial womb uses the animal's own heart to circulate blood, rather than mechanical pumps which can hurt the animal and lead to development problems or lung issues later on.