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Cryopreservation embryo sperm

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Added: 23.01.2021
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If these 'spare' embryos are of sufficiently good quality they can be frozen and placed in storage for your future use. Why are surplus embryos created? IVF and related treatments normally involve stimulation of the ovaries to produce a number of eggs. We aim to fertilise all of the eggs removed in order to have a selection of embryos to grow, as not all embryos have the potential to develop. As they are growing we are able to select the best quality for replacement.
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Cryopreservation of embryos and oocytes in human assisted reproduction

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Cryopreservation of embryos and oocytes in human assisted reproduction

There are a variety of reasons that cryopreservation may be done, both electively or as part of a course of infertility treatment. Midwest Fertility Specialists provides comprehensive cryopreservation services to help you grow your family now or in the future, including the retrieval, testing and storage of reproductive tissue. We will store your eggs, sperm or embryos indefinitely until you are ready to use them. It is never a guarantee that reproductive tissue will be viable when thawed. However, advances in egg and embryo freezing techniques over the past 10 years have improved the process of cryopreservation considerably. Midwest Fertility uses a process called vitrification, which greatly reduces the chance of ice formation within eggs and embryos and has significantly increased the likelihood of survival upon thawing. There is also extensive evidence that there is no increased risk of congenital birth defects, anomalies or other abnormalities in pregnancies achieved with cryopreserved eggs or embryos.
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Embryo cryopreservation

Cryopreservation is a technique used by IRMS to freeze and then thaw eggs, embryos or sperm for use in in vitro fertilization IVF cycles. Thawed sperm may also be used in IUI intrauterine insemination treatment cycles. During the standard course of infertility treatment, hormones are used to stimulate the development of multiple eggs. Embryos may be cryopreserved at any stage between day 1 and day 7 after egg retrieval. However, not all embryos are candidates for cryopreservation.
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Cryopreservation of embryos is the process of preserving an embryo at sub-zero temperatures, generally at an embryogenesis stage corresponding to pre-implantation, that is, from fertilisation to the blastocyst stage. Embryo cryopreservation is useful for leftover embryos after a cycle of in vitro fertilisation , as patients who fail to conceive may become pregnant using such embryos without having to go through a full IVF cycle. Or, if pregnancy occurred, they could return later for another pregnancy. Spare oocytes or embryos resulting from fertility treatments may be used for oocyte donation or embryo donation to another woman or couple, and embryos may be created, frozen and stored specifically for transfer and donation by using donor eggs and sperm. Embryo cryopreservation is generally performed as a component of in vitro fertilization which generally also includes ovarian hyperstimulation , egg retrieval and embryo transfer.
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