If you have sex everyday is it harder to get pregnant ?

Is it with the same person ?

Are you trying to get pregnant. Since there are more fertile times, one would try and time sex for those times if you were wanting to get pregnant.

But having sex every day is a lot bigger chance to be pregnant than not having sex at all

If you are trying to become pregnant, sex everyday is not necessary, but it won't usually hurt your chances unless there is a concern regarding sperm count.

Generally it is suggested that sex every other day is adequate to insure a decent number of healthy sperm when trying to become pregnant.

I'm pretty it just makes your percentages of getting pregnant higher. Make sure your on a good birth control and using new condoms (to prevent breakage)