How long does it take for the cervix to dilate after cervical effacement in a second pregnancy?

The cervical canal disappears four weeks before the cervix dilates in a second pregnancy. The detailed analysis is as follows:

In general, cervical canal effacement gradually occurs in the later stages of pregnancy and is typically followed by cervical dilation about four weeks later. However, in second or multiple pregnancies, the timing of cervical effacement may vary depending on individual maternal differences, the mother's physical condition, gestational age, and other factors. Cervical effacement marks the beginning of cervical dilation and represents a key transitional point in the labor process. When the cervical canal is still present, the cervix is usually tightly closed, preventing the fetus from passing through the cervical passage into the vagina. Once the cervical canal has effaced, the cervix begins to dilate, allowing the fetus to pass smoothly through the cervix into the birth canal, thereby initiating delivery. However, excessive physical activity and inadequate rest may lead to premature cervical effacement and early cervical dilation. Therefore, during late pregnancy, it is important to maintain healthy lifestyle habits, manage emotional well-being, and avoid placing excessive stress on the body.

It is recommended to seek medical attention promptly if any discomfort or unusual symptoms occur, to prevent adverse effects on health.