@article{correa_mattos_ferrari_2001,  title={In situ variation of cervical mucus pH during exposure to atmospheric air},  volume={34},  ISSN={0100-879X},  url={https://doi.org/10.1590/S0100-879X2001000600011},  DOI={10.1590/S0100-879X2001000600011},  number={6},  journal={Brazilian Journal of Medical and Biological Research},  publisher={Associação Brasileira de Divulgação Científica},  author={Correa, C.H.M. and Mattos, A.L.G. and Ferrari, A.N.},  year={2001},  month={Jun},  pages={767–770} }