Embryo freezing 74%

EMBRYO FREEZING 74%

Human embryos created by in vitro fertilization were frigid with 1,2-propanediol as a cryoprotectant. Embryo endures later defrost was connected to the existence of a core in frozen cells and reduced with the expanding amount of cells in the frozen embryo. None of five embryos frozen 3 or 4 days later in vitro fertilization continued to live when unfreeze. Of 48 early embryos (35 patients) frozen 1 or 2 days later in vitro fertilization, 42 (87.5%) were moved in 32 patients. Ten pregnancies were introduced after frozen embryo transfer (ET). If we expel the three infertile patients who had sexual intercourse in the fertile period, then the pregnancy rate for each patient who had 1- or 2-day frozen embryo(s) was 22% (7 of 32). One of the pregnancies was acquired after embryo transfer of a 1-cell pronucleated frozen and warm embryo. The rate of continuous pregnancies later triple fresh embryo transfer was 23%. In patients having four embryos acquired in a single in vitro fertilization cycle, the wonted complete live born rate in an in vitro fertilization - embryo transfer program including embryo cryopreservation can apparently alike that of normal human fertility.

Determinants lead to believe the success rate of human embryo freezing in an IVF and ET Program.

There are certain factors that lead to believe the achievement of embryo cryopreservation were determined from 124 cycles of IVF and ET program in which 193 1- or 2-day embryos were frigid and had already been warm. There were 100 change of possessions of one or two existing embryos from which 26 pregnancies were introduced into. There are several factors considerably influenced embryo survival after warming. They were the developmental level of frozen embryos; the presence of the embryo at the time of freezing; and the way of ovarian stimulation in the in vitro fertilization cycle. The pregnancy rate after frigid-warm embryo transmission was superior with 4-cell frozen embryos in comparison with the embryos at all other levels linked. There were also propensities for the pregnancy rate to be much higher if a voluntary luteinizing hormone growth takes place in the transmission cycle or if the continuation of embryo storage did not surpass 1 to 2 months. The outcome acquired backing a new policy in an in vitro fertilization - embryo transfer programs: it has to be favourable for the unproductive couple if the instataneous fnew embryo transmission is only accomplished with the classification of embryos that displays a poor aptitude for continuationl following cryopreservation procedures.

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