HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Lindahl, I. L. Search for Related Content PubMed PubMed Citation Articles by Lindahl, I. L.

Pregnancy Diagnosis in Dairy Goats Using Ultrasonic Doppler Instruments

Sheep and Fur Animal Research Branch, USDA, Beltsville, Maryland 20705

ABSTRACT

Accurate diagnosis of pregnancy in does from one to 104 days before kidding was made by using an ultrasonic Doppler technique. Detection of pregnancy 106 days and more before kidding was not possible with external transducers. Prediction of multiple births has not been successful to date. The instruments are portable and can be used anywhere, since they employ are chargeable battery pack as a source of power. Instruments with a frequency of 5 MHz seem to be superior for early detection of pregnancy, whereas those with a frequency of 2.25 MHz may be superior for the detection of fetal heart movement in fetuses near term.