Implantation spotting most commonly appears in the days leading up to the menstrual period. Therefore, the ideal time to take a pregnancy test would be when a period is missed or when at least 15 days have passed since sexual intercourse. At that point, the result of the pregnancy test would be reliable.
Conversely, if the pregnancy test is performed too early, the result could be inaccurate. The pregnancy test detects the beta-hCG hormone, which is secreted by the embryo after implantation. If the test is done too soon, the beta-hCG levels may not have risen sufficiently, resulting in a false negative.
Read the full article on: What is implantation bleeding? Characteristics, signs and symptoms ( 84).

Marta Barranquero Gómez
B.Sc., M.Sc.
Graduated in Biochemistry and Biomedical Sciences by the University of Valencia (UV) and specialized in Assisted Reproduction by the University of Alcalá de Henares (UAH) in collaboration with Ginefiv and in Clinical Genetics by the University of Alcalá de Henares (UAH).
License: 3316-CV