Related articles:
Fertility awareness
Natural family planning
Basal body temperature
Birth control
Hormonal contraception
Menopause
Pope Pius XII
Contraceptive sponge
Key terms:
method
days
cycle
fertility
length
infertile
rhythm method
woman
phase
catholic
couples
standard days method
unprotected
luteal
nfp
avoid pregnancy
fertility awareness
family planning
periodic abstinence
failure rate
birth control
ruling
formula
roman catholic
consider
bleeding
per year
augustine
estimated
infertile phase
synonymous
sacred penitentiary
other methods
smulders
knaus
teach
catholic church
length of the woman
natural family planning
ovulation
pope
cervical
suggested
physician
tracking
factors
identified
when used to avoid pregnancy
promoted
georgetown university
Search external links cited by footnotes on Wikipedia page Calendar-based methods:
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