Which procedure involves inserting a needle into a womans abdomen and uterus to?

The procedure you are referring to is likely amniocentesis. This medical test involves inserting a thin needle through the woman's abdomen and into the uterus to collect a small sample of amniotic fluid. The amniotic fluid contains fetal cells and various substances, which can be analyzed for genetic disorders, neural tube defects, and other conditions. It is typically performed during the second trimester of pregnancy.