div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentkoreamed-synapse-a-synapse-a-data-a-pdfdata-a-vol-4-no-1-p-29-34htmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: KoreaMed Synapse › Synapse › Data › PDFData › · vol 4 No 1 P 29-34 Mar 1989 Profile of the Billings Ovulation Method Acceptors and Use-effectiveness of the Method loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsnetreader034viewer20220423225f0cc37e7e708231d4370340html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentkoreamed-synapse-a-synapse-a-data-a-pdfdata-a-vol-4-no-1-p-29-34htmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: KoreaMed Synapse › Synapse › Data › PDFData › · vol 4 No 1 P 29-34 Mar 1989 Profile of the Billings Ovulation Method Acceptors and Use-effectiveness of the Method loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsnetreader034viewer20220423225f0cc37e7e708231d4370340html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentkoreamed-synapse-a-synapse-a-data-a-pdfdata-a-vol-4-no-1-p-29-34htmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: KoreaMed Synapse › Synapse › Data › PDFData › · vol 4 No 1 P 29-34 Mar 1989 Profile of the Billings Ovulation Method Acceptors and Use-effectiveness of the Method loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsnetreader034viewer20220423225f0cc37e7e708231d4370340html5thumbnails3jpg width=140...