R.D.
WE used it after two of my children until I stopped breastfeeding and could go on the pill. NO children. Then, when I went off the pill, we used it about a year, and we now have a 4th child born 9 years after his next sibling. I do think you have to be really careful with inserting it. I think that is what happened to us, without relaizing it, it fell out before it had a chance to dissolve. (I found it in the sheets later in the week.) Right after I found out I was pregnant, I told someone at work that is what we used. She was using the same product, and thought she might need to change. Before she could change, she found out she was pregnant.
That is our experience with it. I found out about it from a friend who also used it after childbirth, and didn't have any unplanned babies. I would say if you don't care if you get preggers, us it, but if you don't want another baby, then use the condoms with the VCF, or find another method.
R.