Vitrification of oocytes produces high pregnancy rates when carried out in fertile women

Comparison outcome of fresh and vitrified donor oocytes in an egg-sharing donation program

“…In total, 192 of 210 (91.4%) oocytes survived after vitrification. We found that there was no statistically significant difference in fertilization rates (84.4% vs. 86.6%) between the vitrified and fresh oocytes, which is similar to what other researchers have obtained with other vitrification systems (13,(30)(31)(32)(33)(34)(35). This suggests that vitrified oocytes retain their morphologic and functional integrity.…”

Oocyte slow freezing using a 0.2–0.3 M sucrose concentration protocol: is it really the time to trash the cryopreservation machine?

“…More recently, in 2010 Kim et al (37) reported a 6.4% implantation rate per warmed oocyte in a group of fertile patients with a mean age of 31.7 AE 3.0 years, using vitrification.…”

Luteal phase oocyte retrieval and in vitro maturation is an optional procedure for urgent fertility preservation

“…One of our patients had two MII oocytes in her luteal phase oocyte retrieval, possibly suggesting that there is a benefit from hCG priming. Fertility preservation in cancer patients has typically involved freezing embryos and oocytes, and the rates of pregnancy from vitrified oocytes were reportedly acceptable (27,28), although larger series are still needed to draw firm conclusions. It has recently been shown that vitrification of in vitro matured oocytes yields satisfactory results (29).…”