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Egg freezing: a new means of generating life

For women struggling to get pregnant, There is a new technique for Assisted Reproduction in the market, egg freezing, also called vitrification.
The freezing is to preserve the eggs in liquid nitrogen using a technique of cooling.
The best technique is known as vitrification, because they do not produce crystals
ice at the time of solidification in liquid nitrogen, making
the transition to solid state, called vitreous (glass-like).
This technique was used for decades to preserve semen and embryos, but there was resistance to the ovules. Furthermore, um study at McGill University in Montreal, Canada, published in Reproductive Biomedicine showed that the rate of children
generated with some kind of defect was 2,5%, the same percentage of children generated in natural births.

Women who turn to egg freezing take drugs to stimulate ovulation for a few days. Following, eggs are aspirated from a puncture, with the aid of sedative.
“Today we believe that there is practically no difference between a fresh and a frozen egg. The quality is almost the same”, he Raul Nakano, gynecologist and specialist in human reproduction.
A technical, can say, is a revolution for women. Several factors may complicate pregnancy.
Firstly, is an outlet for women, for any reason, had to remove the ovary.
Furthermore, vitrification of oocytes can be recommended for women who are undergoing chemotherapy and radiotherapy, they are treatments that can affect reproduction capacity.
But not only for physical causes that egg freezing is effective. Currently, Many women want to delay pregnancy. The peak of reproductive life going to the 30 years, with limit 35 years.
It is recommended to collect the eggs until that age, because after a while ovulation begins to fall, as well as the quality of the eggs.
“Another advantage is that this technique enables creation of databases
ova, as already exist in the semen. Patients Ha concordam
in donating eggs for women who do not produce”, diz o doutor Nakano,
that recommends keeping eggs frozen for up 10 years. Unmarried patients who have a family history of early menopause may use the technique of vitrification
eggs to preserve their fertility for the future there is the possibility of the woman
make the process of fertilization with fresh eggs and not get pregnant.
Depends on the quality of the eggs, person's age, etc. “If the woman is young, a chance to succeed can overcome 50%.

If you pass the age of thirty, odds diminuem, between 30% and 50%. Nature offers some 20% chance por ciclo.”
In the method of freezing, it is believed that, every three attempts, near 80% women get pregnant, therefore, oftentimes, required more than one attempt.

Ethical Issues
O doutor Raul Nakano, graduated from the Faculty of Medicine of Ribeirão Preto and expertise in Kanazawa Medical University and Keio University, points out that this method ends with the philosophical problems, ethical and religious about freezing embryos.
“The eggs are just cells and its disposal does not cause controversy”.

*Dr. Raul Nakano is director of Ferticlin Fertility Clinic.
email: ferticlin@ferticlin.com.br