If pregnancy doesn't occur, oestrogen and progesterone levels will drop. In the second half of the cycle, the levels of progesterone hormone will increase and this gets the womb ready for pregnancy. When the level of the oestrogen hormone in the body increases, the ovaries will release an egg (ovulation). Your body's hormones control the menstrual cycle. A period usually comes every 28 days, but it's normal if it's longer or shorter than that. Others have mild cramping at the same time as the spotting.īut for many women, the two types of bleeding aren’t different at all.The length of a menstrual cycle varies from person to person. If it’s been more than two weeks, it’s unlikely that any spotting you're having is implantation bleeding.Ībout a third of women who report having experienced implantation bleeding often describe it as distinct from their usual premenstrual spotting - some say the blood is darker and not as red compared with normal period blood. The timing of when you last had sex might also help you figure it out. The best way to know whether you’re pregnant or not is to wait a few more days and take a pregnancy test. And unfortunately, there’s no conclusive way to find out. Since implantation bleeding is a symptom that can often occur before you test positive on a pregnancy test, it can be hard to know whether light bleeding is an early sign of pregnancy or just normal spotting leading up to your period. period bleeding: How to tell the difference Implantation bleeding usually only lasts one or two days. This won’t cause any problems (the endometrium recovers!) but some women will experience light bleeding, from pinkish or red to brown discharge.ĭownload the What to Expect app to track your pregnancy, connect with other parents and more! Download How long does implantation bleeding last? Next, the embryo attaches itself to the endometrium, where it becomes reliant on a mother’s body - for the first time - for nutrients and oxygen. When the embryo implants, it can disrupt tiny blood vessels in the spot it burrows into. It’s starting to need more nutrients, and the endometrium has filled in enough to support it. It's already been thickening throughout the menstrual cycle, but it’ll need to grow and mature even more to protect and nourish an embryo.Īround five to six days after fertilization, the quickly growing embryo has moved down the fallopian tube and into the uterus. Trusted Source Cleveland Clinic Implantation Bleeding See All Sources Īfter ovulation and at the moment an egg is successfully fertilized by a sperm in a fallopian tube, the embryo starts dividing and growing. At this time, the inner lining of the uterus, called the endometrium, starts to change. This happens about seven to 14 days after fertilization and is a common cause of light bleeding in early pregnancy. When the fertilized egg implants, it can disrupt some tiny blood vessels. Implantation bleeding is light bleeding or spotting that happens when a fertilized egg successfully attaches to the lining of your uterus, known as the endometrium. While it can be hard to tell, many women who go on to have healthy, normal pregnancies have what’s called implantation bleeding around the time that their embryo lodges itself into the side of the uterus.
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