Fertility Calculator
date: label: copyright date
content: 1933
notes: label: Description
content: Fertility calculator with “SCIENTIFIC INSTRUMENTS / INC. / FORT WAYNE, IND.” and “COPYRIGHT 1933 / ALL RIGHTS RESERVED” inscriptions. Advertisements termed this “a slide rule which calculates accurately the sterile and fertile cycles according to the Ogino-Knaus-Rhythm theory.” When faced with evidence presented to the Supreme Court, in 1942, the firm admitted that “according to the weight of reliable medical opinion at present, no method of calculating such periods can be relied on.”
label: Description
content: The underlying information was developed in the 1920s by Kyusaku Ogino, a Japanese gynecologist, and Hermann Knaus, from Austria.
label: Location
content: Currently not on view
topic: label: Subject
content: Women's Health
setName: label: See more items in
content: Medicine and Science: Biological Sciences
label: See more items in
content: Health & Medicine
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1992.0210.01
label: catalog number
content: 1992.0210.01
label: accession number
content: 1992.0210
objectType: label: Object Name
content: Fertility Calculator
physicalDescription: label: Physical Description
content: aluminum (overall material)
label: Measurements
content: average spatial: 2.3 cm x 21.3 cm; x 7/8 in x 8 3/8 in