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Taking Charge of Your Fertility: The Definitive Guide to Natural Birth Control, Pregnancy Achievement, and Reproductive Health,
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Martina Bartu
I did not read 10th edition. In the 20th anniversary edition there is a new useful color picture insert (very useful). Improved fertility charts, some new and updated chapters.
Cristina
I haven't read the 10th anniversary addition so I can't get into detail about the specific differences but I did opt for the 20th anniversary as the author does state the information is more up to date and the addition of some images were included which aren't in the previous addition.
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