Scientists have created miniorgans from cells floating in the fluid that surrounds a fetus in the womb – an advance they believe could open up new areas of prenatal medicine.Miniorgans, or “ organoids,” are tiny simplified structures that can be used to test new medical treatments or study how the real organs they mimic work, whether they are healthy or diseased.Researchers from University College London and Great Ormond Street Hospital in the United Kingdom collected cells from amniotic fluid s...