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Home▶ Journals▶ Indian Journal of Veterinary Sciences and Biotechnology▶Archive▶Vol. 18 No. 4 (2022)▶Doppler Ultrasonographic Study on Haemodynamic  Alterations…
Indian Journal of Veterinary Sciences and Biotechnology
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Print ISSN 2394-0247 · Online ISSN 2395-1176
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Research Article

Doppler Ultrasonographic Study on Haemodynamic  Alterations in Medically Terminated Canine Pregnancies

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Sri Charan Patruni — Department of Veterinary Gynaecology & Obstetrics, College of Veterinary Science, SVVU, Tirupati-517502, Andhra Pradesh, India
Anusha Konjeti — Department of Veterinary Clinical Complex, College of Veterinary Science, SVVU, Proddatur-516360, Andhra Pradesh, India
Mutha Rao Murakonda — 3Livestock Research Station, Lam, Guntur-522034, SVVU, Andhra Pradesh, India
Raghunath Mulinti — 4Department of Veterinary Clinical Complex, College of Veterinary Science, Tirupati-517502, SVVU, Andhra Pradesh, India
Nasreen Ahmed — Department of Veterinary Clinical Complex, College of Veterinary Science, Tirupati-517502, SVVU, Andhra Pradesh, India
Published 4 Jul 2025 Vol. 18 No. 4 (2022), pp. 12-17 ● Open access
❝ How to cite 🔗 https://doi.org/10.48165/ijvsbt.21.4.03
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Abstract

This study evaluated maternal and fetal haemodynamic changes in medically terminated canine pregnancies using Doppler  ultrasonography. Twelve pregnant bitches (35-40 days gestation) were divided into a Group I (control group, n=6) and Group II (treatment  group n=6). A combination protocol of cloprostenol (1 µg/kg SC every 48 h) and cabergoline (5 µg/kg PO daily) was used to induce  abortion for bitches in group II. Parameters assessed included biparietal diameter (BPD), combined thickness of uterus and placenta  (CTUP), fetal heart rate (FHR), progesterone levels, and Doppler parameters (PSV, EDV, RI, PI, S/D ratio) in the uteroplacental artery (UPA),  umbilical artery (Uma) and fetal aorta (FA). All group II bitches aborted within 3-5 days, with progesterone dropping below 1 ng/mL  by day 5. Significant haemodynamic disruptions were observed post-treatment, including increased UPA resistance (RI >0.61, EDV <15  cm/s) and diminished Uma diastolic flow, signaling placental insufficiency. No structural differences in BPD or CTUP were noted. These  findings underscore Doppler’s role in high-risk pregnancy management and abortion monitoring in canines.  

 

Keywordsuteroplacental arteryumbilical arteryDopplerResistive indexprogesterone

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