This book gives specific instruction on the use of two methods of family planning: Natural Family Planning and Fertility Awareness Method.
These methods give couples natural choices:
1. To avoid pregnancy, you can determine when you are infertile and have sexual intercourse without conceiving.
2. To become pregnant, you can track the days of the month when you are most fertile and have intercourse when you are most likely to conceive.
3. These safe non-invasive techniques can be used by themselves or combined with other contraception methods.
4. The techniques are...

This first Spanish edition of the "best book on the subject" gives specific instruction on the use of two methods of family planning: Natural Family Planning and the Fertility Awareness Method. These methods give couples natural choices:
**To avoid pregnancy, you can determine when you are infertile and have sexual intercourse without conceiving.
**To become pregnant, you can track the days of the month when you are most fertile and have intercourse when you are most likely to conceive.
Women with any kind of heart risk, especially those who smoke, are especially endangered by the...