@article{202307.1069, doi = {10.20944/preprints202307.1069.v1}, url = {https://doi.org/10.20944/preprints202307.1069.v1}, year = 2023, month = {July}, publisher = {Preprints}, author = {Chih Yu Chen and Sheng Hung Wang and Tien Chung Wang and Gin Chung Wang}, title = {Harmonic Analysis of Hemodynamic Status at Different Pregnancy Stages Using Photoplethysmography}, journal = {Preprints} }