I am wondering if anyone has any positive news share. I have recently gone through my 4th IVF cycle and at my 8 week scan ok measured 6 weeks. We had 2 embryos but we only saw one sac on the screen. A really silly question but could the other sac have been missed? Could the 6 week embryo survive? I know I'm clutching at straws. We have a follow up scan in 2 days. Many thanks.