That's awesome! I am an early dilator too.I am usually 3cm by 36 weeks and 4cm by 39 weeks.So yes, you can walk around for awhile at 3 or 4cm dilated, but that means that you have that much less to go when you're in labor, which is good because some women really work hard to get to 3cm!Hopefully you'll have a somewhat quick labor (my last one where I started out at 4cm was only 3 hours). 50% means you're 50% effaced. Effacement refers to the thickness or thinness of your cervix. Effacement is measured by percentage, with 0% being a thick and hard cervix and 100% being a very soft thin cervix that is "gone." So it sounds like you're on your way!!