Schedule
9:00 - 19:30, Mon - Thu
9:00 - 17:00, Fri
Oocyte vitrification and fertilization
Assisted Reproduction Center

Can egg vitrification cause problems during the pregnancy?

Cryoconservation is a method that consists of freezing gametes or embryos. Substances are used to increase the viscosity of the preservation medium until it becomes almost solid. This prevents the formation of ice crystals, which are very harmful to cells. Oocyte or embryo vitrification is carried out at a temperature of -196º C; the time and therefore the age of the embryos are stopped until the moment when it is decided to implant them. Although the oocyte remains intact, the use of this technique involves the elimination of the cells that accompany the oocyte (granular cells); therefore, it prevents the oocyte and the sperm from naturally recognizing each other, making conventional in vitro fertilization (IVF) impossible. That is why, after vitrification, the egg can only be fertilized by sperm microinjection (ICSI). Fresh eggs, on the other hand, can be fertilized by IVF, and in these cases, it is nature that decides which sperm will fertilize the egg. The transfer of embryos obtained from fresh or vitrified eggs does not determine the implantation rate or the percentage of women who succeed in having a child.

Dr. Iñaki González-Foruria
Medical Director
COMB: 40780
Dr. Clàudia Forteza
Gynecologist in Human Assisted Reproduction
COMB: 50849
Dr. Rebeca Beguería
Gynecologist in Human Assisted Reproduction
COMB: 40754
Joan Massó
IVF Lab Director
CBC: 21270C
Dr. Manel Fabó
Anaesthetist Doctor
COMB 23569
Monica Mandas
Nursing
COIB: 057909
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08029 Barcelona Spain
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(+34) 936 555 888

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Photo inside of Natuvitro Clinic in Barcelona
Photo inside of Natuvitro Clinic in Barcelona
Photo inside of Natuvitro Clinic in Barcelona
Photo inside of Natuvitro Clinic in Barcelona
Photo inside of Natuvitro Clinic in Barcelona
Photo inside of Natuvitro Clinic in Barcelona
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