No, the first week of pregnancy does not correspond to the first week of embryonic development, but to the period and the beginning of the menstrual cycle. The embryo has not yet formed, it does not exist and, therefore, it is not possible to detect pregnancy with a pregnancy test or blood test.
Given that conception has not occurred at this point, the hCG hormone is still not present in your body, which is the hormone detected by pregnancy tests.
Learn more: When to Do a Pregnancy Test? – Instructions for Use, Results & Accuracy.
Read the full article on: When does week 1 of pregnancy start? – Are there any symptoms? ( 59).
Zaira Salvador
B.Sc., M.Sc.
Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI)
License: 3185-CV
