Fertility Friend Online - An online ovulation charting sevice with expert support. There is a free trial available for this service which helps you understand and track your fertility status.

Fertilitext - Dedicated to helping hopeful parents become pregnant - A very professional site with a wide range of information about everything from the basics of the ovulatory cycle to trying to conceive after age 35 to herbs and medicines useful in trying to conceive. Includes an ovulation calculator.

Conceiving Concepts - Helping Couples Become Families - Provides a wide range of information and support for couples trying to conceive, from bulletin boards to medical procedure information.

Family of the Americas - Natural Family Planning - This organization provides an overview of natural family planning on their website, along with anatomy and physiology information. They offer a wide variety of books and other materials to educate you and assist you in using the Ovulation Method to conceive a child.