I want to have another child but my tubes are tied, so what can I do?

IVF or Surgery. Ivf or surgery to reverse the tubal ligation both have a place. Ivf is often the best option because it has a higher success rate faster, and at a lower cost. If you are younger (<35) or want multiple preg. Then surgery may be a good choice. Not many of us do many surgeries because they are not covered by insurance. Ivf much better if you are older (over 35). See specialist.
IVF or reversal. Ivf is often the best option today. Ivf offers very good pregnancy rates in an advanced program, and offers ways to reduce the risk of downs' syndrome. A surgical reversal of sterilization is also a good route, for younger women. Check with your fertility doctor for advice.