Clots usually do not affect conception. The fact that vaginal bleeding has clots does not indicate that pregnancy will be more or less easy to achieve. If clots are common and pregnancy does not occur, it is advisable to consult a specialist in case there is a problem with the receptivity of the endometrium.
Read the full article on: Why do blood clots occur during menstruation? ( 84).

Andrea Rodrigo
B.Sc., M.Sc.
Bachelor's Degree in Biotechnology from the Polytechnic University of Valencia. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia along with the Valencian Infertility Institute (IVI). Postgraduate course in Medical Genetics.