Fertility awareness
Subtitle: how to become pregnant when you want to, and avoid pregnancy when you don't
By: Regina Asaph Pfeiffer and Katherine Whitlock ; illustrations by Sally Hammerman.
Contributors: Whitlock, Katherine.
Publisher: Prentice-Hall
Published: 1984
Place of publication: Englewood Cliffs, N.J
Language: eng
Number of pages: 214
Subjects: Menstrual cycle.; Fertility, Human.; Pregnancy.; Contraception.
Notes: Bibliography: p. 192-204.
"A Spectrum book."
Includes index.