Prospective randomized comparison of human oocyte cryopreservation with slow-rate freezing or vitrification

For Whom the Clock Ticks: Reproductive Ageing and Egg Freezing in Dutch and British News Media

“…Later studies have similarly suggested that vitrification results in higher oocyte survival rates (81%) compared to slow-freezing methods (67%) and is more efficient in establishing pregnancy (38% vs. 13%) (Smith et al, 2010(Smith et al, , p. 2088). …”

Live birth of healthy twins following transfer of re-cryopreserved blastocysts developed from frozen embryos recovered from a malfunctioning freezer

“…In this report, embryos were frozen at the pronuclear stage, which might be another reason why such a high survival rate was achieved. As an alternative to traditional slow freezing, vitrification has been successfully employed in the cryopreservation of human oocytes and embryos with higher rates of success [6][7][8]. To prevent the unforeseen freezer malfunction, we have switched to vitrification as the preferred embryo cryopreservation method.…”

Fertility Protection in Female Oncology Patients: How Should Patients Be Counseled?

“…They considered vitrification as the standard procedure for the cryopreservation of oocytes [38]. According to a review by Cobo et al published in 2009, oocyte survival rates after vitrification were 97% with an open vitrification system, a significantly higher rate than the 75 % rate obtained with a closed system [39]. According to recent data, the pregnancy rate after transfer of vitrified fertilized oocytes was 38% [40].…”

“…Cytostatic drugs are associated with increasing fibrosis of the ovaries, leading to a decrease in the number of granulosa cells and primordial follicles [5,7]. Irradiation of brain tissue with more than [35][36][37][38][39][40] Gy results in most cases in damage to the hypothalamic-pituitary-adrenal axis and hypogonadism [8]. Irradiation of the pelvis promotes fibrosis of the uterus.…”