Meron po. If trying to get pregnant, make sure na magsipag during your fertile days, araw-arawin kung kaya. If avoiding pregnancy naman, better if gamitan pa ng ibang precaution like condom and withdrawal on days near your fertile period. Personally, extra cautious pa rin ako during the 2-3 days before and after my fertile period para mas safe. With the calendar method, so far ay no unwanted pregnancy pa naman kami going 5yrs married. While nabubuntis ako within 2-3 months of trying.