Mustbemad, the worst part of IVF - and the most frustrating - is the heap of tests and the couple of scans and the pain of paying for drugs which all has to be carried out before you even fly over. If you are using donor eggs (huge success rates; massive) you will have to be at the clininc in Prague on the same day your partner gives his sperm sample (the donor will have been stimmed with drugs, along with you, in order to synchronise your cycles). Her eggs are harvested, mated with his sperm and then watched via time-lapsed video using an embryoscope to ascertain the winners. Five days after egg collection they transfer the two best embryos into your uterus. We flew home the same day, but got their too early - three days before egg collection - because we wanted to make a holiday of it.
Lots of women with Important Jobs and whose husbands have Important Jobs simply cannot spend all that time together abroad
and so the fella flies out to give his sperm, flies back the same day and then the woman flies out the night before transfer and flies home as soon as the embryos are on board 
I would think very, very carefully about using own eggs at 43 - unless you have loads of money and can hack returning time and again to Prague for more attempts.