I weaned my son much earlier than I wanted to because I wanted to get the ball rolling on fertility cycles. He took almost 3 years to TTC so I didn't want to waste any time thinking that it might take a long time again and because it was not only an FET cycle for me, but a donor cycle for a friend. I felt extra pressure to start asap. I weaned him at 8 months and it was no biggy for him because he had been on a nursing strike, but it was SO heartbreaking for me. I cried for a couple weeks about it and still have a lot of guilt that I didn't nurse him longer. I will say that it was worth it because I think everything happens for a reason and I wouldn't have my daughter if things didn't play out the way they did (she was conceived 5 months later through a natural cycle after the cycle failed).
If you are really having hesitations about it and your don't have age constrictions that are making you want to start earlier; maybe put it off for a couple months and see how you feel? Go with your gut though. :)
With my daughter, she is happily nursing at 19 months and even though we are TTC, we'll wait to do any FETs until she is weaned completely. Even though some of the hormones are fine to take during breastfeeding, I'm a little leery. I feel like why risk it when there is such little research on it?Â
One of my friends weaned her 30 month old twins so that she could do an FET cycle. It didn't work out for her, but she says now that it was the kick in the pants she needed to finally night wean. She says it was hard, but she was ready.