[Family Planning - "Billings" ovulation method]. 1980

Martha Sílvia Bhering, and Hisako Kajiyama
Enfermeira Obstétrica, Chefe do Serviço de Enfermagem do Hospital e Maternidade Vila Maria, São Paulo, SP.

The authors present "Billing" ovulation method as natural family planning.

UI MeSH Term Description Entries

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