The yellowing of the leucorrhea after ovulation is not an indicator of pregnancy. This is because after ovulation and the luteal phase, progesterone may be more exuberant, causing more vaginal shedding cells and more cervical shedding cells, making the leucorrhea thicker and creamy or even yellow, which is a normal physiological change at this time. However, the presence or absence of pregnancy cannot be judged by the leucorrhoea and there is a certain degree of error. You can go to a pharmacy and buy a pregnancy test about 12 days after intercourse to rule out conception. If you have already had your period during this period, it means that there is no chance of pregnancy, because menstruation is one of the best indicators of the absence of conception, do not be overly nervous and anxious, which can also affect the delay of menstruation.