Using Micro-Ultrasound to Measure Mouse Embryonic and Placental Growth
Author Information
Author(s): Mu Junwu, Slevin John C, Qu Dawei, McCormick Sarah, Adamson S Lee
Primary Institution: Samuel Lunenfeld Research Institute of Mount Sinai Hospital, Toronto, Canada
Hypothesis
Can micro-ultrasound accurately quantify embryonic and placental growth in mice during gestation?
Conclusion
Micro-ultrasound is an effective tool for measuring embryonic and placental growth in mice and estimating gestational age and body weight.
Supporting Evidence
- Gestational sac dimension was measurable from E7.5 and increased linearly.
- Crown-rump length was a good predictor of embryonic body weight.
- Regression equations were developed to predict gestational age from ultrasound parameters.
- Ultrasound measurements agreed with light microscopy with less than 25% discrepancy.
- Micro-ultrasound allows for earlier and more precise measurements than previous methods.
Takeaway
Scientists used a special ultrasound to take pictures of baby mice growing in their mom's belly, helping them understand how they grow.
Methodology
The study used 40 MHz ultrasound to measure growth parameters in pregnant CD-1 mice from embryonic day 7.5 to 18.5.
Potential Biases
Some embryos may not be visible or in the correct orientation for measurement, leading to potential measurement errors.
Limitations
The high cost of equipment and the skill required for accurate measurements may limit the method's accessibility.
Participant Demographics
Pregnant CD-1 mice and other strains including C57Bl/6J and B6CBAF1.
Statistical Information
P-Value
<0.05
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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