What is a mucus plug and why does it appear?
A mucus plug is a jelly-like substance that forms in the cervix during pregnancy. Its main function is to act as a protective barrier to prevent bacteria or other external agents from accessing the uterus, where the baby develops. As labor approaches, the cervix begins to dilate, and this plug may partially or completely detach.
This phenomenon is a normal part of the process of preparing for labor, and it usually occurs days or even weeks before the onset of labor. On many occasions, the plug is expelled without the pregnant woman noticing it.
How to recognize the mucus plug?
The mucus plug usually has a thick, gelatinous texture that is whitish, yellowish, or clear. However, on many occasions it can be accompanied by threads of blood or have a pink or brown tone, which is completely common and should not cause alarm.
This occurs because, when detached, small capillaries from the cervix can rupture, generating that light bleeding. This process is known as the "bloody show," and it's one of the most common signs that your body is preparing for labor.
A mucus plug with threads of blood is a common sign as labor approaches.
When is it normal and when to worry?
Although it is common for the mucus plug to have some blood in it, there are certain cases in which it is advisable to consult with your healthcare professional:
The bleeding is heavy, similar to a period.
It is accompanied by severe abdominal pain or very frequent contractions before week 37.
You have a fever, malaise, or discharge with an unpleasant odor.
You have a history of preterm labor or previous complications.
In the absence of these signs, the expulsion of the mucus plug (even with some blood) does not require urgent attention and may simply indicate that labor is approaching, especially if you are in week 37 or older. According to the American College of Obstetricians and Gynecologists (ACOG), this process may anticipate the onset of labor, but it does not mean that it will begin immediately.
What to do after the mucus plug is expelled?
If you notice the mucus plug coming out, you don't need to go directly to the hospital unless you have regular contractions, leakage of amniotic fluid, or heavy bleeding. You can take advantage of:
- Rest and prepare emotionally for childbirth.
- Make sure you have your hospital bag ready.
- Notify your midwife if you had control indications nearby.
Many times labor can still take several days or even weeks, so the observation of the symptoms is more important than the exact moment of expulsion of the plug.
"The bloody mucus plug can be a sign that labor is approaching, but it doesn't always mean it will start right away. It is a normal physiological change at the end of pregnancy."
Conclusion: listen to your body and keep in touch with your professional
The presence of blood in the mucus plug is usually not a cause for alarm, especially if it is scarce and you are in the last weeks of pregnancy. However, if you have any doubts or symptoms that worry you, trust your instinct and consult your healthcare professional. Every pregnancy is unique, and it's important to have personalized follow-up.
Guidance information