@article{202306.2223, doi = {10.20944/preprints202306.2223.v1}, url = {https://doi.org/10.20944/preprints202306.2223.v1}, year = 2023, month = {June}, publisher = {Preprints}, author = {Laura Baños Cándenas and Daniel Abehsera Davó and Lucía Castaño Frías and Ernesto González Mesa}, title = {Study of the Metrorrhagia of the First Trimester. Early Pregnancy Loss, Importance of Advanced Maternal Age}, journal = {Preprints} }