If there is blood on the day of ovulation, it is mainly due to the fact that the hormone level in the body drops at the time of ovulation, which leads to the shedding of the uterine lining. If you have sex at this time, then clinically there is still a possibility of pregnancy, because the endometrium will be repaired as soon as possible in a short period of time, and it takes about 9 days from the day of ovulation for the fertilized egg to enter the uterine cavity. So the lining of the uterus repairs and thickens, then the fertilized egg enters the uterine cavity and has a chance to latch on and become pregnant. It is recommended that in this case, if you are not pregnant this month, it is best to take a blood test on the 2nd or 3rd day of your period to find out about the sex hormone six. Depending on the result, we will see if it is necessary to give conditioning in the clinic, and if so, we will consider pregnancy after conditioning.