Hi Beata
I had two IVF cycles with fresh transfer and was lucky the second time around.
The first time I had read about the pineapples juice - it is actually the pineapple CORE that is supposed to help implantation. We had a stressful two hour drive back from the clinic. I went home, put my feet up and really dosed up on slices of fresh pineapple the next day. No luck.
In between cycles I read conflicting info that pineapple can cause contractions

. So the second time around I avoided it, but did try the STRAWBERRIES. Rather than combating Sydney traffic we spent the night in Sydney, dined in a lovely restaurant and had an early night. This time = success. I should point out the second time was a Day 5 transfer, instead of Day 6 which is thought to have a slightly higher success rate.
I really do not know if the strawberries helped, or not. But there seems to be a lot of chat about both strawberries and pineapples on the www.
All the best Beata - hope to see a ticker under your signature very soon
WTH