Ovulation Induction (OI)

Ovulation induction refers to specific fertility treatment aimed to stimulate ovulation (the release of an egg or oocyte) in women who do not do so spontaneously.


Failure to ovulate (anovulation) or failure to ovulate regularly in otherwise fertile females can be due to many hormonal problems the most common being polycystic ovarian syndrome or PCOS, which is a metabolic disorder. It is easy for your Fertility Specialist to determine whether you ovulate or not and Ovulation Tracking is very useful in this regard.


The first thing that needs to happen if failure to ovulate or irregular ovulation occurs is the reason why, Your Fertility Specialist will undertake blood tests and a transvaginal ultrasound to establish the reason. Once any other hormonal problems have been sorted out, and if you are ready to conceive, ovulation can be achieved using medication.

2 Types of medication can be used tablets e.g. clomiphene or letrazole or injections of gonadotropins with or without a hormonal trigger. This treatment has to be very carefully monitored to prevent the risks of multiple pregnancies using blood tests and transvaginal ultrasound.

Risks of multiple pregnancy even with the best monitoring can only be reduced to 6-10%.

In order to keep these risks as low as possible or in patients who regularly grow multiple eggs, IVF would be a better option as one can always have a single embryo transferred and so minimise the risks of a multiple pregnancy.