How long will it take to get 100 effaced and labor when you are 37 weeks 80 percent 2 cm dialated with your first child know the station but he is in position?

There is no way to accurately predict how long it will take for you to reach 100% effacement and begin active labor. Every woman's labor is unique, and the length of time it takes to progress can vary significantly. Some women may progress quickly, while others may take longer.

On average, first-time mothers tend to labor for approximately 12-18 hours. However, it is important to remember that this is just an average and that some women may labor for a shorter or longer period of time. If you are concerned about the progression of your labor, it is best to speak with your healthcare provider.