Pholi - The following paragraph is what my acupuncturist says (about having sex after transfer) in the letter she gave us after transfer:
"Sex. Statistics have shown couples who have intercourse within the first 2 - 3 nights after transfer and then once (or more if you want) per week after that, have a higher succes rate. Orgasm isn't necessary for the woman, but the man must eyaculate. It is believed it helps to "modulate" the immune system, so the embryo isn't recognised as foreign, however the exact mechanism isn't known. If the thought of having intercourse scares you, use less penetration. Don't worry, embryos won't be shaken loose!"
This is a letter with a few other suggestions (diet, lifestyle) that she always gives after transfer. We had sex the night before and l think 1 week later, good luck tomorrow