dload apps tracking period, insert date period..length cycle, then kat situ dh siap kira anggaran bila ovulasi sis. tp ni terpakai klu period regular. klu irregular, beli opk strip, celup everyday...klu peak dua2 line, boleh bd
aside that, emosi jaga, pemakanan jaga, active lifestyle. klu ada pcos, diabetis atau penyakit2 lain, seeks for medical advice before conceive.