Ovulation test paper as red will occur in about 12-24 hours ovulation, women in the middle of the menstrual cycle with ovulation test paper measured two red bars, proving that the female body luteinizing hormone has reached a higher level, the egg has matured, will occur in a relatively short period of time ovulation. Ovulation test paper test positive rate will be in 80%-90%, there may be due to follicular development abnormalities, women do not occur ovulation can not rely on ovulation test paper test, to determine the time of ovulation in addition to daily ovulation test paper test, but also based on the ultrasound monitoring, in the follicular development of 2cm or so when ovulation will occur is more accurate. Women should pay attention to the regularity of life, to ensure adequate sleep, do not stay up late, to avoid emotional fluctuations or work pressure and other influences, so that ovarian ovulation occurs in advance or delayed.