The Billings Method of Natural Family Planning: Controlling Fertility Without Drugs Or Devices

实现为人父的愿望: 生育的178个对策
By 苏静, 李宏军
本书从生男生女奥秘的破解、生育最佳时机的把握、如何生育健康聪明的孩子等方面提供了关于生育的近二百个对策。
The Art of Natural Family Planning: Postpartum Student Guide
By Couple to Couple League
With The Art of Natural Family Planning Postpartum Student Guide you will: - Learn to recognize the hormonal changes in the transition from pregnancy back to normal fertility cycles - Realize the benefits of exclusive breastfeeding for the ...
The Billings Method
By Evelyn Billings, Ann Westmore
The Billings Method
The Art of Natural Family Planning

The Couple to Couple League's Art of Natural Family Planning Student Guide explains the Sympto-Thermal Method of Natural Family Planning.
Choose the Sex of Your Baby: The Natural Way
By Hazel Chesterman-Phillips
Hazel Chesterman-Phillips developed her method of sex determination following her own experience in which she desired and gave birth to a boy after having two daughters.