Having sailed through pregnancy the first time round, we had a long wait for baby #2, which was completely unexpected. We had to do quite a bit of work to fathom our what was happening, and start tracking my cycle really closely. After 5 months, perseverance and patience, we got there! My Lotus worked for us, I'm pleased we went for it because I think we'd still be trying at this point otherwise. Customer service was brilliant as well.
