Sen. Sotto, ovulation, CBCP's Rhythm gan Aspillera, Dahli

Basic practicalities of natural family planning in terms of of international symbols 0I0 gan Ganar, Linda

Basic practicalities of natural family planning in terms of Philippine symbols RDXM gan Ganar, Linda

Calendar method unreliable in family planning, study says

Standard days method bagong paraan ng natural na pagpaplano ng pamilya

Periodic abstinence in the Philippines new findings from a national survey gan Laing, John E.

And they call it "rhythm" the practice of periodic abstinence in Bicol and the Visayas regions gan Logarta-Avila, Josephine

Cael y testun llawn