Not all pregnant women will have typical implantation bleeding, in fact most pregnant women will not have any bleeding at implantation, while others bleed for days. Implanation bleeding is different from one woman to the other and can be just some drops or more substantial bleeding.
Implantation bleeding normally occurs about 3 weeks after the previous menstrual period, which is about a week after ovulation.
Implantation bleeding differs from menstrual period because of the fact that it does not come with any other form of pain, such as back ache or cramping. In addition, implantation bleeding is not as heavy as menstrual bleeding, usually appearing like a few spots of brown blood. Implantation bleeding is considered to be normal for pregnant women and usually poses no threat to the success of the pregnancy.
Implantation bleeding occurs about a few days or a week before the scheduled time of a woman’s menstrual period. Even if only spotting occurs, its occurrence after a week of ovulation may indicate it to be implantation bleeding. However, if spotting occurs just before the usual time when a period is supposed to occur, it will most likely be just a menstrual period.
The most normal pattern of menstrual bleeding is that it will start slowly and will gradually increase to heavier bleeding. menstrual bleeding will last for several days while implantation bleeding lasts for les than a whole day and is usually much less bleeding.
Furthermore, spotting just prior to the expected menstrual period may not always indicate implantation bleeding, and may just mean the period is starting ahead of time. If it actually is menstrual bleeding, it will lead to a greater amount of bleeding, whereas implantation bleeding may only last as spotting and will end swiftly afterwards.
The most effective method to differentiate whether it is implantation bleeding or a menstrual period is to wait and see the outcomes. This will allow one to accurately specify the type of bleeding after it has occurred. In addition, an individual who is not willing to wait may opt for a pregnancy test, although it may be negative.
The main cause of implantation bleeding is the attachment of the embryo to the uterus wall. It takes place near the concluding stages of the implantation process, where a special tissue with a specific job called trophoblast which develops from the embryo and encloses it.
This tissue then attaches itself with the uterus wall called endometrium and starts to burrow itself into it. The trophoblast also enters many of the blood vessels and causes them to crack. This, in turn causes them to leak and collect into the cavities found in the trophoblast, which are connected to the other cavities forming channels of blood in the tissue. As these cavities slowly approach the voids and craters in the uterus, they are expelled from the embryo, causing the bleeding.
In conclusion, implantation bleeding is characterized by spotting lasting for up to a day, about a week prior to the expected menstrual period and about a week after ovulation, while a menstrual period starts 2 weeks after ovulation and is heavier and lasts 3-5 days.