Although studies indicate an increase in pregnancy chances after the fourth attempt with artificial insemination, depending on the case, it is possible that, after three failed IUI attempts, your doctor refers you to IVF. This depends on each situation as well as on aspects such as the causes of infertility, the woman's age, the causes that led to failure of previous IUI attempts, etc.
Read the full article on: What is the probability of success of intrauterine insemination? ( 56).

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.