Hi, Scent & all. If you can tell the difference between male & female flowers presumably you have little courgettes on the plant, behind the female flowers. If the courgette vegetable is growing don't worry about the flowers. Maybe they open in the morning and close before you see them again. If they get wet or sit on wet soil they will rot. Not a problem unless you want to fry them as they do in Greece.
I usually find, as has happened this year the first couple of courgettes are small and insignificant, usually stunted at about the size of a woman's little finger. I take these off and new better sized ones follow. Once you have little courgettes on feed once a week with liquid tomato food. Water at the base of the plant, don't wet leaves, they don't like tap water on their leaves.
Hope this helps.