Women who resort to egg freezing achieve higher pregnancy rates
A team of research scientists from the Reproductive Medicine Unit at Dexeus Mujer carried out a retrospective study to determine the pregnancy rate in a group of women who decided to freeze their eggs at our clinic between 2009 and 2017, for social reasons. A total of 342 women with a mean age of 37.6±2.8 years resorted to this fertility preservation option in that time. We monitored 71 of these women, who returned to the clinic at a later stage in order to conceive.
9.6% (32/342) of the women started an IVF cycle after thawing and insemination of their eggs. Their mean age at the time was 40.9±2.5 years, and nearly half of the women (45.5%) achieved pregnancy after the first attempt. 26% of the women miscarried (4/33) and more than half (21/33) had their remaining embryos frozen. A total of nine embryo transfers were performed which gave rise to six pregnancies. The cumulative pregnancy rate was 60.6%.
5.8% (20/342) decided not to thaw any eggs and to undergo IVF or artificial insemination (AI) instead. The IVF pregnancy rate was 38.4% (5/13).
Lastly, 5.3% (18/342) of the women became pregnant spontaneously and kept their eggs frozen, except for one who requested their destruction.
According to the authors, the findings show that the pregnancy rates achieved reflect the age at which the patient's eggs were frozen. Although many women choose to resort to assisted reproductive techniques using fresh rather than frozen eggs, in the first instance, pregnancy rates are lower as a result of age.
Oral communication: Observation of non-medical fertility: 8 year follow-up.
González Llagostera Clara, Solé Inarejos Miquel, Devesa Rodríguez de la Rúa Marta, Boada Palá Montserrat, Barri Ragué Pere N, Veiga Lluch Anna