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Updated: Dec 22, 2025

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Is My Mouse Pregnant? High-Frequency Ultrasound Assessment
Published on: March 18, 2021
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Abdominal Imaging in pregnancy (maternal and foetal risks)
1St. Vincent's Hospital Melbourne, PO Box 2900, Fitzroy, VIC, 3065, Australia.
Summary
For pregnant patients with inflammatory bowel disease, ultrasound and MRI without contrast are preferred imaging tests. Computed tomography is reserved for rare cases when other methods are insufficient.
Area of Science:
- Gastroenterology
- Radiology
- Obstetrics
Background:
- Imaging is crucial for diagnosing inflammatory bowel diseases (IBD).
- Safety concerns regarding imaging modalities for pregnant and lactating women often lead to avoidance of necessary diagnostic tests.
- Disruption of breastfeeding is also a concern.
Purpose of the Study:
- To review the safety and utility of various imaging techniques for diagnosing inflammatory bowel diseases in pregnant and lactating women.
- To provide guidance on selecting appropriate imaging modalities to minimize risks to mother and infant.
Main Methods:
- Review of current literature on imaging in inflammatory bowel disease during pregnancy and lactation.
- Discussion of the risks and benefits of ultrasonography, magnetic resonance imaging (MRI), and computed tomography (CT).
Main Results:
- Ultrasonography and MRI without gadolinium are the preferred imaging techniques for pregnant patients due to the absence of ionizing radiation.
- MRI contrast agent gadolinium safety in pregnancy is uncertain, necessitating its avoidance.
- Intestinal ultrasound and MRI without gadolinium can effectively characterize complications like bowel obstruction and collections.
- CT involves ionizing radiation and should be reserved for situations where ultrasound and MRI are unavailable or inadequate.
Conclusions:
- Safe and effective imaging options exist for pregnant and lactating women with inflammatory bowel disease.
- Ultrasonography and MRI without gadolinium are recommended as first-line imaging modalities.
- Careful consideration of risks versus benefits is essential when selecting imaging techniques for this patient population.
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