A few days? I lost it within a week of going into labor. But I don't remember the exact number of days. I had bloody show at 40 weeks and 1 day. DS arrived 12 hours after the bloody show. But about the mucous plug - I hear it can grow back. I know, totally not what you want to hear. Just don't get too excited. It isn't the best sign for impending labor.
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I lost mine at 6am on a Thursday morning... had spotting/ bleeding a little bit all day and started feeling true contractions that evening at 9pm. I had my baby the next day at 2pm. Good Luck!
Re: Mucus Plug
If I lost mine I didnt notice it, sorry not much help!
W (02/2009), N (08/2012), and C (04/2014)