DSNYMama - My supply completely disappears at a mere 4-5 weeks pg, but my nurslings still nursed. At around 20 weeks, my early colostrum started, so that got it up to low supply from no supply. So, no milk doesn't mean the end of nursing. I found nursing while pg to be harder than tandem nursing. I actually think not tandem nursing would have been harder than tandem! I had two pairs and they were different experiences. I went on to tandem my first two kids for 25 months. And the second pair, which included the middle child, for 3 years - so you know it couldn't have been that hard! *I did nightwean my oldest before I got pg the first time around, but he still woke and took longer to fall asleep without. He continued the asking for over a year before I gave in - since then it was waking up the newborn. The second time around, I didn't try to nightwean and found night nursing two wasn't a big deal - other than feeling like a rotisserie chicken sometime! The book "Adventures in Tandem Nursing" is a great resource.