There are many drugs that are used when a couple undergoes a fertility treatment (IVF, insemination, egg donation, etc.). Some are very simple to use and have virtually no side effects and others are more complex and have greater side effects.

We shall now discuss the most commonly used drugs, what they are and their side effects. It should be noted that most medication is hormonal or works on that level, so that side effects in many cases will be similar to those which a woman may generally feel during her cycle or indeed during pregnancy.

Gonadotropins are the fertility drug par excellence. They serve to stimulate controlled function of the ovaries so that eggs can then be collected after being developed in them. They are mostly injectable, either intramuscularly or subcutaneously.

The brands of this drug are as follows and you can watch the following videos which outline in a simple way the correct way to administer them:

Contains the active substance follitropin alfa. This molecule contains follicle-stimulating hormone (FSH). In women, it helps follicle growth and development and helps to produce oestrogen secretion. In men, it is needed to encourage spermatogenesis.

The main aim in assisted reproduction treatment is controlled ovarian stimulation leading to multiple follicle development.

The required dose of medication will be indicated by your gynaecologist based on the ultrasound scans and blood tests that have been performed (oestradiol and progesterone levels).

It is administered by means of a subcutaneous injection using a pen device. The device must be filled using the cartridge containing the drug before it is injected.


  • Pergoveris®

Contains two active substances: follitropin alfa and lutropin alfa. Both belong to the family of hormones called gonadotropins. Follitropin is a molecule that is similar to endogenous FSH (follicle-stimulating hormone). Likewise, lutropin is a molecule that is similar to endogenous LH (luteinising hormone). They complement one another in order to stimulate the growth and development of ovary follicles in women who are embarking on assisted reproduction treatment.

In this case, the vials of powder must be mixed together using the solvent provided immediately before use. Administration is performed via subcutaneous injection.

Your gynaecologist will indicate the dose to be administered. The dose is determined based on each woman’s particular characteristics.

  • Bemfola®

This drug contains the active substance follitropin alfa. It is almost identical to a natural hormone produced by the body known as follicle-stimulating hormone (FSH). FSH is a gonadotropin, a kind of hormone that plays an important role in human reproduction and fertility. In women, FSH is needed for the growth and development of the ovarian follicles containing the ova. In men, FSH is necessary for spermatozoa production.

This drug has been designed for administration by means of subcutaneous injection using a pre-filled pen device that is for single use only. The device must be discarded following use.

  • Menopur® 75 & 1200

The active ingredient in both Menopur 75 and Menopur 1200 is highly purified menotrophin which is obtained from the urine of post-menopausal women. This molecule contains both follicle-stimulating hormone (FSH) and luteinizing hormone (LH) and its use in assisted reproduction is with a view to controlled ovarian stimulation to encourage the development of multiple follicles. This means we are able to obtain an adequate number of eggs for in vitro fertilisation treatment (IVF/ICSI) which will give us the greatest possible chance of pregnancy, depending on the case in each particular woman/couple.

The dose will be determined by your gynaecologist and may vary depending on ultrasound scan and blood analysis (estradiol and progesterone levels) tests carried out throughout the treatment.

  • Gonal®

  • Puregon®

  • Fostipur®

  • Ovitrelle®

is the drug responsible for finishing the maturation of the eggs and also induces ovulation. Depending on the treatment you want to perform, whether artificial insemination (AIC) or in vitro fertilisation (IVF), it will be used to some degree. The patient must always respect the proper timing at the time of administration. As you approach the moment of ovulation, the symptoms may be similar to those experienced during the days prior to menstruation.

Oral contraceptives: are commonly used before a cycle of IVF for various reasons. Among them is to control the cycle and ensure a better response after medication.

Clomiphene citrate (Omifin ®) is an ovulation inducer. It has been used for many years and today it continues to be used on its own or in combination with other drugs. It is easy to take and has minimal side effects.

GnRH analogues: There are several types of these and they can be administered at different times of the IVF cycle according to the effect desired. They generally serve to better control ovarian stimulation and to create a better response to gonadotropins.

Antagonists: Since their introduction in the management of IVF cycles, they have made monitoring the stimulation process more comfortable, serving to prevent early ovulation and the cancellation of the treatment.

  • Cetrotide®

The active ingredient in Cetroide is cetrorelix acetate which is a gonadotropin-releasing hormone (GnRH) antagonist. Its purpose is to foment the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH).

An antagonist means that the molecule is able to adjoin onto the GnRH receptor itself, thus blocking it and stopping it from functioning.

Therefore, cetrotide is used in assisted reproduction treatment in order to avoid premature ovulation of eggs (caused by peaks in LH) so that they can be retrieved using ovarian drilling and, in the case of in vitro fertilisation (IVF/ICSI), fertilised later in the laboratory.

  • Orgalutran®

The active ingredient in orgalutran is ganirelix. This molecule is a gonatropin-releasing hormone (GnRH) antagonist, adjoining onto its receptor (located in the pituitary gland) and replicating its effect. In other words, releasing follicle-stimulating hormone (FSH) and luteinizing hormone (LH).

Orgalutran is used, therefore, in in vitro fertilisation treatment, both in IVF and in ICSI with the aim of stopping egg ovulation taking place prior to ovarian drilling.

Progesterone: Typically taken vaginally in the form of an egg. It provides hormonal support in the luteal phase (after ovulation) when there is not enough or when the treatment requires it. Doses are variable and can also be taken orally.

Oestrogens: we use these drugs to prepare the endometrium and make it more receptive to embryo implantation in an egg donation treatment or when transferring vitrified embryos, etc. which in turn will lead to a normal pregnancy. It can be taken orally or transdermally.

In conclusion, the drugs used in fertility treatments can be handled differently depending on the effect that is sought in each case. This will be individualised for each couple, so that the same drug may be used in one way for one couple and in another way for another couple.

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