Assertion: gynecologic sonography | /r/HasProperty | developed in late 1950s
Facets:
value: originally
type: MANNER
value: by sir ian donald
type: OTHER
Source sentences:
text: Obstetrical sonography was originally developed in the late 1950s and 1960s by Sir Ian Donald and is commonly used during pregnancy to check on the development and presentation of the fetus.
text: Obstetrical sonography was originally developed in the late 1950s and 1960s by Sir Ian Donald and is commonly used during pregnancy to check on the development and presentation of the fetus.