From:  Advancing infectious disease research through a chicken embryo model for developmental studies and antimicrobial screening of lipid nanoparticles

 Limitations of the CEM for biomedical and pharmacological applications.

LimitationDescriptionRef
Underdeveloped immunityAdaptive immunity immature pre-hatch, limiting immune and immunotherapy studies[110]
Ethical constraintsStudies after ED14 need approval[111]
Limited systemic evaluationUnsuitable for chronic or systemic studies, including toxicity, pharmacokinetics, and metabolism[112]
Challenges modelling complex diseasesImmature development limits studies of neurodegeneration and advanced cancers[13]
Ex ovo technical risksContamination, dehydration, and high mortality limit long-term reliability[113, 114]

CEM: chick embryo model.