Why Do Doctors Check the Cervix at 36 Weeks?

During your pregnancy, it is common for doctors to perform certain examinations and tests to monitor the overall health of both you and your baby. One such examination occurs at 36 weeks, specifically to check the status of the cervix. This article aims to explain why doctors check the cervix at this critical stage and what signs and indicators they look for.

Why Check the Cervix?

Doctors check the cervix at 36 weeks for several reasons. One of the primary reasons is to assess the effacement, which refers to the thinning of the cervix in preparation for labor. Another important sign is dilation, which measures the opening of the cervix, indicating how ready the body is for delivery.

Other Indications

There are also other indications that your healthcare provider may want to discuss with you before performing any invasive procedures. These include any previous history of preterm labor or if you are currently experiencing long-lasting contractions that have been present for more than an hour. Your doctor will inform you of these reasons before proceeding with the examination to ensure you are fully aware and comfortable.

What Do Doctors Look for During Cervical Exam?

When checking the cervix at 36 weeks, doctors look for several key indicators that are often used to determine the ripeness of the cervix and predict a soon-to-come delivery:

Effacement (Cervical Thinness)

Effacement is the process of the cervix thinning out, making it more pliable and easier for the baby to pass through during labor. This process is usually measured as a percentage, with 100% meaning the cervix is fully effaced. A cervical length of less than 25mm is often considered a warning sign for preterm birth.

Dilation

Dilation refers to the opening of the cervix, which is crucial for the baby to pass through during labor. Doctors will measure the dilation in centimeters, with 10 centimeters being fully dilated and ready to give birth.

Station of the Baby

The station of the baby is a scale used to describe how high or low the baby's head is in relation to your pelvis/pelvic bone. It is typically measured in terms of centimeters:

1 or higher: The baby's head is above the pelvis. 0: The baby's head is at the level of the ischial spines (pelvic bones). -1 or lower: The baby's head is below the pelvis.

Understanding these measurements helps your doctor anticipate the stage of labor and how your body is preparing for delivery.

Conclusion

Checking the cervix at 36 weeks is a standard procedure in prenatal care. It helps healthcare providers determine the ripeness of the cervix, the dilation, and the station of the baby. These assessments are crucial in predicting the timing and nature of labor. By being informed about these tests and their significance, you can better prepare for the birth of your baby and ensure a safe and healthy delivery.