Myocardial growth goes from proliferation to hypertrophy during development. The measurement of the relative cell area provides information of cardiomyocyte hypertrophy, which is ideal for studying myocardial development.
Luxán, G. and Pompa, J. L. D. L. (2013). Hypertrophy Analysis and Quantification in Embryonic Cardiomyocites. Bio-protocol 3(20): e938. DOI: 10.21769/BioProtoc.938.