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Births resulting from oocyte cryopreservation using a slow freezing protocol with propanediol and sucrose.
Systems Biology in Reproductive Medicine ( IF 2.4 ) Pub Date : 2008-10-23 , DOI: 10.1080/19396360802415778
Janos Konc 1 , Katalin Kanyo , Erika Varga , Rita Kriston , Sandor Cseh
Affiliation  

The human mature oocyte is particularly sensitive to cooling and low temperatures in addition to freeze-thaw damage. The efficiency of oocyte cryopreservation including the pregnancy outcome is still low. The aim of our study is to briefly introduce our preliminary clinical results achieved with oocyte cryopreservation (CP). Our work focused on the use of a slow cooling procedure using the cryoprotectants propanediol (1.5 M) and sucrose (0.3 M). Following a short incubation of 4-6 hours thawed oocytes were injected with a single sperm (ICSI) and fertilization was assessed 12-16 hours later. Laser assisted hatching (LAH) was performed on all transferred embryos and embryo transfer (ET) was carried out 48-72 hours after ICSI. One-hundred and ten eggs were thawed and a survival rate of 76% (84/110) was obtained. Of the 84 oocytes which survived, 64 subsequently fertilized (64/84; 76%) following ICSI and on the following day 55 of those had cleaved (55/64; 86%). Fifty-two embryos were transferred in 29 patients (1.8 embryo/patient), and 7 (7/29; 24%) resulted in clinical pregnancy (1 twin pregnancy). One of the pregnancies encountered first trimester abortion (1/7; 14%). Implantation rate of 15.4% per embryo transferred (8/52) and 7.3% per egg thawed (8/110) were obtained. In all cases, chorion biopsy was performed and chromosomal anomalities were not detected. Our results provide further evidence that the procedure can be applied safely and with good success in clinical assisted reproduction. However, more work is needed since the survival and implantation rate should be improved.

中文翻译:

使用缓慢冷冻方案与丙二醇和蔗糖冷冻保存卵母细胞而产生的出生。

人类成熟的卵母细胞除冻融损伤外,对冷却和低温特别敏感。包括妊娠结局在内的卵母细胞冷冻保存的效率仍然很低。我们的研究目的是简要介绍我们通过卵母细胞冷冻保存(CP)获得的初步临床结果。我们的工作重点是使用冷冻保护剂丙二醇(1.5 M)和蔗糖(0.3 M)进行缓慢冷却。短暂孵育4-6小时后,向融化的卵母细胞注射单个精子(ICSI),并在12-16小时后评估受精率。对所有转移的胚胎进行激光辅助孵化(LAH),并在ICSI后48-72小时进行胚胎转移(ET)。解冻一百十个鸡蛋,存活率达到76%(84/110)。在存活的84个卵母细胞中,ICSI之后有64位受精者(64/84; 76%),第二天有55位卵裂了(55/64; 86%)。29位患者(每位患者1.8个胚胎)中转移了52个胚胎,其中7个(7/29; 24%)导致了临床妊娠(1对双胎妊娠)。其中一个怀孕发生了早孕流产(1/7; 14%)。每个移植的胚胎的植入率为15.4%(8/52),每个融化的鸡蛋的植入率为7.3%(8/110)。在所有情况下,均进行绒毛膜活检,但未检测到染色体异常。我们的结果提供了进一步的证据,表明该程序可以安全地应用于临床辅助生殖,并取得了良好的成功。但是,由于应提高存活率和植入率,因此需要更多的工作。86%)。29位患者(每位患者1.8个胚胎)中转移了52个胚胎,其中7个(7/29; 24%)导致了临床妊娠(1对双胎妊娠)。其中一个怀孕发生了早孕流产(1/7; 14%)。每个移植的胚胎的植入率为15.4%(8/52),每个融化的鸡蛋的植入率为7.3%(8/110)。在所有情况下,均进行绒毛膜活检,但未检测到染色体异常。我们的结果提供了进一步的证据,表明该程序可以安全地应用于临床辅助生殖,并取得了良好的成功。然而,由于应提高存活率和植入率,因此需要更多的工作。86%)。29位患者(每位患者1.8个胚胎)中转移了52个胚胎,其中7个(7/29; 24%)导致了临床妊娠(1对双胎妊娠)。其中一个怀孕发生了早孕流产(1/7; 14%)。每个移植的胚胎的植入率为15.4%(8/52),每个融化的鸡蛋的植入率为7.3%(8/110)。在所有情况下,均进行绒毛膜活检,但未检测到染色体异常。我们的结果提供了进一步的证据,表明该程序可以安全地应用于临床辅助生殖,并取得了良好的成功。但是,由于应提高存活率和植入率,因此需要更多的工作。获得的移植率为每个移植的胚胎15.4%(8/52)和每个融化的卵7.3%(8/110)。在所有情况下,均进行绒毛膜活检,但未检测到染色体异常。我们的结果提供了进一步的证据,表明该程序可以安全地应用,并在临床辅助生殖中获得成功。但是,由于应提高存活率和植入率,因此需要更多的工作。每个移植的胚胎的植入率为15.4%(8/52),每个融化的鸡蛋的植入率为7.3%(8/110)。在所有情况下,均进行绒毛膜活检,但未检测到染色体异常。我们的结果提供了进一步的证据,表明该程序可以安全地应用于临床辅助生殖,并取得了良好的成功。但是,由于应提高存活率和植入率,因此需要更多的工作。
更新日期:2019-11-01
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