Traveling international with progesterone oil needles and syringes

I will be Traveling overseas to Czech Republic for fertility treatments at the end of October 2019 - I will be traveling from houston to France ( lay over ) the. France to Prague , Czech Republic- I will

Need to travel with my progesterone oil ( needles and syringes ) should these be in my carry one with a letter from my doc with rx looking for the best advice on how to travel internationally with the above medications any advice or did you run into any trouble ?

Thanks so much