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Sonographic fetometry in the bovine.
1Gynecological and Ambulatoric Animal Clinics Faculty of Veterinary Medicine University of Munich D-8 München 22 Germany.
Theriogenology
|May 1, 1989
Summary
Transrectal sonography in heifers allows for precise fetal age assessment. Fetal organ and body part measurements accurately predict bovine intrauterine development and gestational age.
Area of Science:
- Veterinary Medicine
- Reproductive Biology
- Medical Imaging
Background:
- Accurate assessment of bovine fetal development is crucial for reproductive management.
- Transrectal sonography offers a non-invasive method for monitoring pregnancy.
- Establishing reliable fetometric parameters is essential for determining gestational age.
Purpose of the Study:
- To evaluate the utility of transrectal sonography for assessing bovine fetal development.
- To establish fetometric measurements for various fetal organs and body parts.
- To correlate fetal measurements with gestational age in heifers.
Main Methods:
- 485 transrectal sonographic examinations were performed on 19 pregnant heifers.
- Fetal organ size and intrauterine position were assessed.
- Regressions and correlations between fetal structures and gestational age were calculated.
Main Results:
- Fetal organ accessibility varied by gestational stage, with the head consistently accessible.
- Posterior presentation was common in early gestation but decreased significantly after Month 7.
- Detailed growth-rate data and correlation coefficients were obtained for numerous fetal structures.
Conclusions:
- Transrectal sonography is effective for monitoring bovine fetal growth and development.
- Fetal organ and body part measurements can reliably determine gestational age in heifers.
- This study provides a comprehensive dataset for ultrasound-based fetal age determination in cattle.