Tests done by OBs

• Short medical procedures?
• Thin innermost membranous sac enclosing the developing embryo in higher vertebrates (Amniota reptiles
• Prenatal procedures, informally
• Prenatal tests, for short
• Birds
• OB/GYNs perform them
• OB's perform them

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Amnios \Am"ni*os\, n. Same as Amnion . [1913 Webster] ||

Wiktionary Word definitions in Wiktionary
n. (context anatomy English) amnion