How effaced and dilated are you usually when go into labor?

It's important to note that cervical effacement and dilation are gradual processes that occur over time during labor. The rate of progression varies from woman to woman and may also depend on factors such as parity (whether it's the first pregnancy or subsequent ones), the position of the baby, and the effectiveness of labor contractions.

Typically, at the onset of labor, the cervix may be around 0-1 centimeters dilated and 0-30% effaced. As labor progresses, the cervix gradually effaces (thins out and opens) until it reaches 100% effacement, and dilates (widens) to about 10 centimeters to allow the baby's head to pass through.

Here's a general guideline for effacement and dilation during labor, although individual experiences can vary:

Early Labor:

- Effacement: 0-50%

- Dilation: 1-4 centimeters

Active Labor:

- Effacement: 50-80%

- Dilation: 4-7 centimeters

Transition Phase:

- Effacement: 80-100%

- Dilation: 7-10 centimeters

It's worth mentioning that some women may experience rapid dilation, known as precipitous labor, where the cervix dilates quickly from minimal dilation to fully dilated in a short period. On the other hand, some women may progress slowly or experience prolonged labor, where the dilation and effacement process takes a longer time.

Healthcare professionals monitor cervical changes during labor to assess progress and make appropriate decisions for the safety of the mother and the baby.