Bleeding in the first trimester of pregnancy

Causes of bleeding in month one, month two and month three of gestation

Almost a third of all pregnancies present bleeding in the first trimester without necessarily being a loss of pregnancy. Some women may have a slight spotting after sexual intercourse, as the cervix is more vascular and sensitive. And sometimes the bleeding can be caused by reasons that have nothing to do with pregnancy, such as a urinary infection, vaginal yeast infection, or trauma.

Causes of bleeding during the first trimester of pregnancy

  • Implantation bleeding. It can appear from week 4 to week 7 of pregnancy, as a consequence of the implantation of the fertilized egg in the wall of the uterus. The bleeding is scanty, pinkish or brownish in color and is not accompanied by pain, neither in the lower abdomen, nor colic type. It usually disappears spontaneously and is considered physiological. In any case, it is advisable to make a medical consultation to confirm that this is the cause.
  • Hormonal changes. The hormonal changes of the time you should be menstruating, can also cause vaginal small stained, sometimes similar to menstrual bleeding.
  • Threat of abortion. It generally occurs when blood loss is greater and is always associated with abdominal cramps. Pregnancy can be interrupted spontaneously and there are various causes that can cause it; such as an infection, trauma, medications, bruises, or an abnormality in the fetus, although the vast majority of the time the cause is unknown. And it can also happen for no apparent reason. There is no specific treatment, rest and ultrasound controls are recommended to assess the development of the embryo. When 2 or more spontaneous abortions occur in a row, it is recommended to go to the fertility consultation for a more complete study.
  • Subchorial hematoma. Bleeding in the first trimester of pregnancy can be due to the formation of small blood lakes between the surface of the uterus and the pregnancy tissue, they can also cause bleeding, generally without being accompanied by pain. In most cases they are reabsorbed and disappear spontaneously.
  • Ectopic pregnancy. It is that pregnancy that is implanted outside the uterine cavity and therefore its development is not viable, it presents little blood loss but with severe abdominal pain, sometimes radiating to the shoulder area and is usually accompanied by dizziness and vomiting. It requires emergency, pharmacological or surgical treatment, depending on the evolution of the pregnancy.
  • Hydatidiform mole. It is a cause of bleeding, associated with many digestive symptoms such as nausea and vomiting. In this case, the normal pregnancy egg is replaced by a similarly fast-growing tissue that occupies the entire interior of the uterus.

As the common symptom of all these problems is bleeding in the first months of pregnancy, an immediate consultation with the gynecologist is essential, who will determine which of them is affecting your pregnancy and act accordingly.

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