Has anyone had one? If so, did your period come early? I had an endometrial biopsy on Monday and my period turned up rather rude and abruptly last (although my temps had been dropping the past couple of days). No cramps yet though but it is heavy so I assume this is it. I wasn't due until Sunday though (I know from OPKs and temping - I always have a 14 day luteal phase). Do you think the biopsy was the cause? A luteal phase defect is the last thing I need to add to my list of woes!