Female fertility preservation

Female fertility preservation

In the event that you need to preserve your fertility, for medical reasons (surgery, chemotherapy or radiotherapy) or social reasons, (delayed motherhood) your eggs (ova) or ovarian tissue can be cryopreserved until you are ready to use them.

Although freezing oocytes might reduce their viability, our pregnancy success rates using thawed oocytes is reaching that obtained with fresh oocytes. This is due to the fact that we use a freezing technique called “vitrification” that has one advantage over conventional forms of freezing, namely, the survival rate of the oocytes once thawed is better.

This Unit is the only one in the Alicante province and one of the very few in Spain that is authorised by the Ministry and Department of Health to fertilise oocytes that have been frozen.


“Today, women build their own identity, take the initiative, participate, fight, don’t give up, takes the lead, decide the course of their lives, choose when to be a mother and plan the best moment to get pregnant.”


Maternity is a unique experience which involves changes in the woman and her partner’s life. There is a growing number of women of reproductive age that delay the moment of being a mother in order to grow personally and develop a career.

The quantity and quality of the eggs of a woman decreases irreversibly throughout their life, that is why age is a basic parameter that conditions fertility. If you choose to delay childbearing, choose to preserve your fertile eggs and avoid infertility.

In the event it is necessary to preserve your fertility due to social or medical reasons (surgery, chemotherapy or radiotherapy), you can cryopreserve your eggs and ovarian tissue until you want to use them thanks to the innovative process of vitrification.

The HLA Vistahermosa Reproduction Unit encourages women, who haven’t still found the moment or appropriate person to have children with, to vitrify their eggs before the age of 35. From age 36 to 40, the egg freezing is less successful. Bear in mind that when you are over 40, the best rates of pregnancy will always be with frozen eggs than with fresh oocytes.

Unlike the classic freezing method, vitrification is an ultra-fast freezing method at a speed of over 15.000ºC per minute. It keeps cells unaltered and with its properties intact over time, up to the moment when you decide to become a mother.

The main advantage of this process, regarding the traditional freezing method, is that it avoids the formation of ice crystals that may damage the eggs. It obtains excellent clinical results of around 97%, similar to the results obtained with fresh oocytes.

Know your ovarian reserve

One of the parameters that helps plan your maternity is to know your ovarian reserve, that is; the quantity of follicles in your ovaries. This way, you can calculate the right moment to get pregnant or choose the vitrification of your eggs and be a biological mother in the future.

Women are born with a number of oocytes that wear out throughout the cycles and as months go by, the quantity and quality decreases. The number of follicles you start with and the speed at which these reduce, is variable and different in each women.

A vaginal ultrasound is done the third day of the menstrual cycle to measure the ovarian reserve. This will determine the number of follicles in the ovaries. Depending on the count of follicles and their diameter, we can assess the ovarian function and value the probabilities of getting pregnant.

If the counting of mature eggs is ranging from six to ten in each ovary, we are in normal values. If the number is lower than five it means that the ovarian reserve is low and therefore the chances of natural gestation decrease.

This study can be completed with a hormonal profile done through blood analysis which measures the Anti-Müllerian hormone. This hormone is involved in the follicle development and maturation. The higher the levels of this hormone, the higher the ovarian reserve.


Our fertilisation with cryopreserved eggs success rate is higher than 82%, a percentage very similar to the one obtained with freshly extracted eggs. The HLA Vistahermosa Reproduction Unit is one of the centres in Spain to first abandon, years ago, the classic egg freezing method to only use freezing by vitrification of eggs.


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