It is normal for implantation bleeding to occur on the same day as menstruation, and the symptoms of implantation bleeding are very similar to menstruation. Therefore, some people often do not know they are pregnant and treat implantation bleeding in early pregnancy as menstruation, but there are also differences between the two. First of all, the amount of bleeding, the amount of implantation bleeding is usually not as much as menstruation and there is no blood clot. Secondly, the color of the bleeding is different. Menstrual bleeding is usually dark red while implantation bleeding is brown or red. The timing of implantation bleeding in early pregnancy is not certain, but usually occurs about 7 days after conception. If the bleeding is 7-10 days from the date of ovulation it may be implantation and you can go to the hospital for a blood test, if the bleeding is more than 12 days from the date of ovulation it may be the onset of menstruation. In addition, bleeding on implantation has no adverse effects on a person’s health and there is no need to be overly nervous.