Miracle_baby,
If u have started IVF and really want to travel, then i think Lucrin stage is the safest but you must note that you have to jab yourself on time so if you will forget, either you set alarm or maybe try not to travel. For me, bo pian cause DH's granny 80th Birthday, really have to go back if not MIL won't be happy.
I seriously hope to stay put in Singapore for all the stages but now no choice so I told DH, Lucrin will be the ONLY stage I travel, other than that I will just glue myself to Singapore. Don't care, even if this annoys anyone. Hahah..