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* IVF treatments take place in our VivaNeo fertility center Wiesbaden.

Egg Freezing

Whilst freezing sperm cells as well as embryos in the pronuclear, 8-cell or blastocyst stage has long been established as a standard method, it was not clear until 2010 whether there is a similarly effective freezing method for unfertilised eggs. Then, in 2010, the first European working groups were able to show that there are special freezing methods that can achieve similar pregnancy rates to fresh egg cells. Initially, freezing eggs (oocyte cryopreservation) was intended mainly for women dealing with the possibility of a loss of fertility as a side effect of upcoming treatment, such as chemotherapy, for example. However, the technique is now used to offer women more flexible life planning as well. It means that women who cannot or who do not want to have children at the current time for private or professional reasons can have their eggs frozen and use them at a later time to get pregnant. The term ‘social freezing’ is now commonly used to designate egg freezing for non-medical reasons.

Egg freezing: Biological background

The number of eggs available to every woman is already fixed at birth, since no new eggs are developed over the course of a woman’s life. With age, this reserve of eggs shrinks. 

This means that as a woman ages, two problems arise in terms of her fertility:

1. The older a woman is, the fewer eggs are available for successful ovulation. This reduces the chances of fertilisation. 

2. Age also affects the quality of the eggs. As a rule of thumb, from around age 35, the likelihood of abnormalities, complications in pregnancy and miscarriages increases and the chances of becoming pregnant are reduced. This development actually starts before a woman turns 35, although the risk of adverse effects is significantly lower in younger women.  

Egg freezing can increase the chances of pregnancy at a later date by retrieving healthy eggs as early as possible and storing them.

When is the optimal time for egg freezing?

As the chances of natural pregnancy start decreasing from the age of 30, it is best to perform egg freezing as early as possible. The most reliable studies at the moment work on the basis of a 40% chance of a subsequent live birth for 10 stored eggs, 60% for 12 eggs and 90% for 20 eggs, if the eggs were retrieved at the optimal stage of life (i.e. when the woman was younger than 30).

How many eggs should be retrieved?

Egg freezing does increase the likelihood of pregnancy at a later date, but cannot guarantee it. Thus, to further increase the chances, several eggs are usually frozen and stored. The older a woman is at the time of egg freezing, the lower the probability of a later pregnancy, since the egg quality is already impaired. As many eggs as possible should be retrieved, which can be difficult in this situation, since the egg reserve is often already reduced. Under certain circumstances, several hormone stimulations and egg retrievals may therefore be required.

Risks and side effects for mother and child

Studies show that children conceived from frozen eggs are at a risk level comparable to that of children conceived during normal IVF/ICSI cycles. The hormone treatment required for egg freezing generally entails mild physical stress for women. These days, hyperstimulation rarely occurs any more thanks to the improved stimulation protocols. Individual consultation is part of the treatment.

What do health insurance companies pay?

The costs of egg freezing are not yet reimbursed by health insurance companies in Germany. However, an increasing number of employers are offering to cover some of the costs for their employees. In addition to the cost of hormone treatment and egg retrieval, fees are also charged for freezing the eggs and the yearly storage. When the frozen eggs are used, the cost of in vitro fertilisation is also added.

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