I just had my 25 week ultrasound today.  A is Fraternal, B&C identical, sharing a placenta.  We were told today that A weighs 1.9, B at 1.8, and C at 1.3  Doctor said that was a 25% discordance, and nothing we could do but watch and wait.  He said he suspected IUGR vs TTTF because C's bladder and fluid level were fine.  When we asked questions, all he could tell us is that things didn't look good, and to hope for the best, but prepare for the worst.  He said sometimes...