@article{murta_moron_ávila_1999,  title={Detection of functional changes of the fetal heart in the first trimester of gestation},  volume={72},  ISSN={0066-782X},  url={https://doi.org/10.1590/S0066-782X1999000600009},  DOI={10.1590/S0066-782X1999000600009},  number={6},  journal={Arquivos Brasileiros de Cardiologia},  publisher={Sociedade Brasileira de Cardiologia - SBC},  author={Murta, Carlos Geraldo Viana and Moron, Antônio Fernandes and Ávila, Márcio Augusto Pinto de},  year={1999},  month={Jun},  pages={745–750} }