The Spermicidal Powers of Chemical Contraceptives: III. Pessaries

@article{Baker1931TheSP,
  title={The Spermicidal Powers of Chemical Contraceptives: III. Pessaries},
  author={JOHN R. Baker},
  journal={Journal of Hygiene},
  year={1931},
  volume={31},
  pages={309 - 320}
}
  • J. Baker
  • Published 1 July 1931
  • Biology
  • Journal of Hygiene
1. A technique is described for comparing the spermicidal powers of pessaries, using human sperms. 2. Those pessaries which do not contain cocoa-butter are more spermicidal than those that do. 3. Quinine and lactic acid pessaries, in cocoa-butter vehicles, are almost without effect upon sperms. 4. There is more than ten times as much quinine bisulphate in a quinine pessary as suffices to kill all sperms in half an hour, but the cocoa-butter prevents its action in some way which is not at… 

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References

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The Spermicidal Powers of Chemical Contraceptives: II. Pure Substances

1. A technique for comparing the spermicidal powers of pure substances is described in detail. It is hoped that this may be accepted as the standard technique for the purpose. 2. The killing

The Spermicidal Powers of Chemical Contraceptives. I.: Introduction, and Experiments on Guinea-pig Sperms

The spermicidal powers of the various chemical contraceptives sold to the public have never previously been compared, and no one has been in a position to say that one spermicide is preferable to