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If you don't conceive even after 1 year of having unprotected sex then you will need to investigate yourself as a case of infertility
.But since you were doing family planning for last 6 months no need to worry you still have time.Try to have sex every alternate day during ovulation period that is from 10th -20th day in a 28 day cycle.Before & after that you can have sex as you like .After sex you need to keep lying down for at least 2 hours.
These are few guidelines you can follow to increase your chance of conception.
All the best.