Gravidity detection method and apparatus

Details Gravidity detection method and apparatus Gravidity detection method and apparatus

1977-08-22

1978-09-05

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

73614, G01N 2900

Patent

active

041110544

ABSTRACT:
Ultrasonic detection of early pregnancy in sows and like animals is enhanced by basing an assumption of pregnancy upon detection of a substantially echo-free animal zone of predetermined width or greater which may occur over a substantial range of animal depths, combined with detection of a distinct echo from a greater depth than the echo-free zone.

REFERENCES:
patent: 3164007 (1965-01-01), Stebbins et al.
patent: 3423992 (1969-01-01), Dory

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