Bleeding during pregnancy which can be mistaken for a period while pregnant is possible— most especially in the first cycle after conception.
This article covers bleeding that looks like a period while pregnant in very early pregnancy, typically before pregnancy is confirmed. You can find more causes of bleeding during pregnancy in the first trimester here and the second and third trimester here.
Conception that occurs close to menstruation or low progesterone levels may cause what looks like a period while pregnant. Even if you had unprotected sex on that day and sperm found egg later that day, it would still take the fertilized egg six to twelve days to reach and implant in your uterine lining.
This could leave as little as one day between conception and menstruation. Break through bleeding is usually seen during the first cycle after conception, and may continue in the first trimester.
It would be sporadic bleeding that will vary in flow. As this can be indicative of low progesterone, it should be evaluated by a doctor, in fact, any bleeding during pregnancy should. It should also be noted that even if there is bleeding when your period is due, if you are pregnant, ovulation will not occur again.
This type of bleeding is not a true period while pregnant. You cannot have what is technically referred to as a period while pregnant, because your uterine lining is not entirely shed along with the egg or your baby would be lost. Implantation bleeding may be mistaken for a period while pregnant.
Many women also mistake implantation bleeding for a period while pregnant. If you followed the same example above, and usually had a light period, and you had spotting on day 23, you may think that spotting was your period simply a day or two early. Implantation bleeding varies from woman to woman, but a heavy flow is almost never implantation bleeding. You can read a full article on telling the difference between implantation and your period here.
Sporadic bleeding during pregnancy may be mistaken for a period while pregnant. Finally, numerous other causes can result in bleeding during pregnancy. I personally have known quite a few women who experienced sporadic bleeding for the first several months of their pregnancy that they mistook for a period while pregnant. You can read about these in more detail in the posts link at the beginning of this article for bleeding during a confirmed pregnancy.
In some cases, no reason is found and nothing is abnormal or wrong at all. Wondering how common bleeding in pregnancy is according to research? Information on Bleeding during Pregnancy. If you experienced bleeding during your pregnancy, we also would love to hear your story. We have a page set up for them here. I do my best to respond to comments within 24 hours.
All comments are moderated. I do reply to each and every one as I approve them. Please remember though, I am not a doctor nor a replacement for medical care.
I do have a medical background medical assisting and am a mother of four who struggled with infertility as well as multiple miscarriages. However, I am not a doctor nor claim to be one. Even more from Life with Gremlins: