 [ Symptoms ] how often should i exfoliate my face [ Disease ] a pregnancy test only reacts to the pregnancy hormone human chorionic gonadotropin hcg however if you are pregnant this hormone will not be present in your urine or blood until 13 to 16 days after ovulation the release of an egg which is around the time that you would normally get your period until this time has passed it will not be possible to see a positive result in a pregnancy test urine tests require a certain level of hcg to be present in order to indicate a positive pregnancy result blood tests are more sensitive because they can detect a smaller amount of hcg which means that pregnancies can be picked up earlier usually between six to eight days after ovulation you can have a blood test at your gp surgery but it is recommended that you take a home urine test before booking an appointment source   pharmacysell