It's completely normal to take up to a year to get pregnant. Diet on both man and woman, ovulation, sperm count, vitamins, weight, stress, heat, all of this and more can factor in.

eating right weight stress the fact if you ovulate or not.. it takes up to a year for healthy couples

what's the factors?

it depends on the woman's body and when she's in ovulation and stress. there's a lot of factors like jaixi said.^

there's only 20-25% chance of getting pregnant if you're in you twenties and healthy. 15% in thirties and so on. its a lot of factors involved in getting pregnant