Having a Period While Pregnant: Is It Possible?

If you are pregnant and you get a period, you will need to go to your doctor to have tests done to determine if there are any pregnancy changes, such as ectopic pregnancy or placental abruption, which can cause bleeding.

It is not normal to have a period during pregnancy because pregnancy interrupts the menstrual cycle. The internal lining of the uterus does not shed, because it is necessary for the baby’s development.

Menstruation is not what causes loss of blood during pregnancy. Therefore, it is important that an obstetrician checks you to see what may be causing it as it may be something that puts the baby’s life in danger.

Having a Period While Pregnant: Is It Possible?

Chief causes for bleeding during pregnancy

Bleeding during pregnancy can have several causes depending on the stage of your pregnancy.

Bleeding right at the beginning of pregnancy is common in the first 15 days after conception and, in this case, the blood is a pinkish color; it lasts for about two days and causes similar cramps to period cramps. So if a woman has been pregnant for two weeks but has not done the pregnancy test yet, she may think she has a period when in fact she is pregnant.  If this is you, please carry out a pregnancy test.

The most common causes of bleeding during pregnancy are:

Pregnancy stagesCommon causes for bleeding
First trimester - 1 to 12 weeks


Ectopic pregnancy;

Placental abruption;


Second trimester - 13 to 24 weeks

Inflammation of uterus;


Third trimester - 25 to 40 weeks

Placenta previa;

Placental abruption;

Onset of labor.

There can also be some bleeding after vaginal examinations, transvaginal ultrasounds, and amniocentesis, and after doing exercise. 

What to do when bleeding during pregnancy

If you bleed during your pregnancy,  no matter at what stage you are at, you will need to rest and avoid any physical effort. Also, you will need to be taken to the doctor as soon as possible, so he can examine you and carry out exams such as an ultrasound to identify the cause of the bleeding.

In most cases, a small amount of blood that happens sporadically, and at any stage of pregnancy is not serious and does not put the life of the mother or the baby at risk. However, go straight to hospital if there is: 

  • Frequent bleeding. If you need more than one pantyliner per day, for instance;
  • Loss of bright red blood in any stage of pregnancy;
  • Bleeding with or without clots and strong abdominal pain;
  • Bleeding, loss of liquid, and fever.

In the last three months of pregnancy, it is common for the expecting mother to bleed after sexual intercourse, as the birth canal becomes increasingly sensitive, and bleeds easily. If this happens, only go to the hospital if the bleeding lasts over one hour. 

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