 [ Symptoms ] are carbs good or bad [ Disease ] the length of a cycle can vary from month to month so i do not know that anyone can confirm that a biochemical pregnancy has caused a delay in your period if the egg has becomes fertilized hcg is produced and a home pregnancy test can detect it in your urine as soon as 6 days before a missed period if you are trying to conceive purchase a home pregnancy testing kit talk to the pharmacist since there are many available that have different sensitivities in detecting hcg a fertilized egg not implanting into the endometrium could point to a luteal phase problem such as insufficient progesterone or problems with the uterine lining