Mummyof2, you would have to look into prices. Here it is not that expensive, overall would cost 2000$ for 20 years of storage... my DH has type 1 diabetes so we figure, especially for our first child it is worth the money in the event anything goes wrong. There are cases where it has been successful for diabetes and I think conditions like leukemia. It really is a personal choice, I know a lot of ppl who didn't do it and a lot that did... so its up to you.
Honeybee, I'm working till about 37 weeks, I work in an office so there is no reason to take a preventive leave, but then I will have a year of paid maternity and my DH gets 5 weeks of paid paternity. I am amazed at how crappy the mat leave is in the US and how different it is here in Canada in comparison.