Intrauterine Insemination

What is Intrauterine Insemination (IUI)?

This artificial insemination method is one of the least complex processes and one of the first that couples try when they begin fertility treatments. It consists of the placement of sperm directly into the uterus for fertilization during the women’s “fertile window”.


Who is a Good Candidate for Intrauterine Insemination?

  • Couples or individuals planning to use a sperm donor.
  • Women suffering from endometriosis, ovulation problems, or vaginal mucosa complications.
  • Males with low sperm concentration.
  • Men or women with unexplained fertility.
  • Couples who have undergone failed treatments using fertility drugs alone.



The couple provides a semen sample or a donor sperm sample is thawed; in this process, the sample is ”washed” to separate normal, active sperm from those considered of low quality to ensure that the insemination contains only those with the greatest probability of reaching fertilization.

For her part, the future mother undergoes an ovulation control, where the fertile periods of the menstrual cycle are recorded to determine the correct date of insemination. If necessary at this stage, a treatment to stimulate ovulation can be recommended.

Once ovulation is detected and the most optimal day is defined, insemination takes place. The process is simple: the sample of healthy sperm is taken at the end of a catheter (a long, thin, and flexible tube) that enters through the vagina and cervix until reaching the uterus, releasing the sperm to fertilize an egg.


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