I tried it but did t concieve...however as soon as i took time away from the forums and stopped using preseed or opks etc i got pregnant. You honestly dont need anything but the relaxation of your mind. If you stop for a cycle and just stop trying and thinking baby and just keep watch over when your fertile period is, you greatly increase your chance to concieve. The reason why many people take so long is they stress about what they need to do and all the things to buy and try. I tried for 17 months until it was the break that caused it.