Natural cycle

Fivclínic is a benchmark centre in natural cycle IVF – we have carried out over 1000 such treatments over more than 20 years.

Natural cycle IVF is a gentle technique that allows the development of the egg selected by your ovary, which favours good embryo quality in a form of treatment that does not require medication, and has a good chance of being successful.

Natural cycle in vitro fertilisation

Who is this treatment for?

  • Women aged over 40 with a low ovarian reserve who have not managed to achieve multiple follicular development (of diverse follicles) in prior IVF cycles with hormonal stimulation.
  • When ovarian stimulation is not advised, as in certain hormone dependent disorders.
  • When the patient does not wish to undergo hormonal stimulation.
  • In cases of repeated poor oocyte quality where hormonal stimulation may have an impact.

Natural cycle IVF is a useful resource for achieving pregnancy using the couples own gametes in some patients previously advised to opt for egg donation.

It is important to take into account the need for a regular cycle — it is not possible where the cycle is irregular.

What is natural cycle IVF?

It is a simple process. Tests and ultrasound scans monitor follicular growth in a spontaneous ovarian cycle, together with the thickness of the endometrium. During the course of the cycle, two to five check ups are required. It is only necessary to administer HCGr and a GnRh antagonist to schedule the time for follicular puncture. Subsequently the fertilisation of the egg will be carried out in the usual way, as will the embryo transfer.

How many natural IVF cycles can be carried out ? Do you need to wait for a long time between treatments?

There is no maximum number of natural IVF cycles that can be carried out. However, we know that after 3-4 unsuccessful attempts the chances of success diminish significantly. On the other hand, as no medication is administered when pregnancy is not achieved, it is possible to try again on the following cycle without needing to wait longer.

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