Several studies have shown that this rise in progesterone is associated with a lower pregnancy rate after
fresh embryo transfer.
After the first
fresh embryo transfer, it will be possible to freeze the remaining embryos and transfer them one by one, which is safe and effective.»
Professor Mol says that while many clinics are moving completely away from
fresh embryo transfers, the freezing process adds additional costs in IVF and does not result in higher rates of live births.
The practice of freezing embryos and then thawing them and transferring them to women's wombs (known as frozen embryo transfer or FET) also increased by 27.6 % between 2008 and 2010; FET cycles had approximately half the multiple birth rate when compared with
fresh embryo transfers, namely 13 % (2008), 11.9 % (2009) and 12 % (2010), with just 0.6 % triplet births in all three years.
Not exact matches
We concluded that the
fresh transfer was impaired by the residual effects of ovarian stimulation on the uterine lining, reducing its receptivity to
embryos.
Depending on the kind of
embryo used —
fresh or frozen — the timing of the
transfer will differ.
The study is in progress, so Dr. Sharara will now examine the results and determine why this trend emerged, and whether frozen
embryo transfer (rather than
fresh) will improve outcomes.
Couples will no insurance coverage pay a set fee that will cover up to 4
fresh Donor Egg cycles, and their resulting frozen
embryo transfers (plus a non-refundable fee of $ 10,500 Donor cost per
fresh cycle).
Impact of single
embryo transfer policy on perinatal outcomes in
fresh and frozen cycles — analysis of the Japanese Assisted Reproduction Technology registry between 2007 and 2012.
Rates of live birth after the first
embryo transfer were 34 % in the frozen
embryo group, and 32 % in the
fresh embryo group.
Freezing and subsequent
transfer of
embryos gives infertile couples just as much of a chance of having a child as using
fresh embryos for in vitro fertilization (IVF), research from Ho Chi Minh City, Vietnam, and Adelaide, Australia has found.
Women were given one cycle of IVF, where either a
transfer of
fresh embryos occurred, or all
embryos were frozen and one cycle of thawed
embryos occurred subsequently without the use of IVF drugs.
Conventional IVF protocols involve the
transfer of a
fresh embryo to the uterus during the same cycle in which the eggs were collected and freezing extra
embryos for future use.
Per
embryo transfer, the live birth rates were 56 percent with
fresh vs 47 percent with cryopreserved oocytes.
Donated
fresh oocytes traditionally have been used immediately, creating
embryos for
transfer into the uterus, with extra
embryos being cryopreserved for later use.
«Thus, having fewer mature oocytes can mean fewer
embryos to choose from for
fresh transfer or future
transfer following cryopreservation, particularly among women who respond poorly to ovarian stimulation.»
All Finnish - speaking couples who had viable pregnancies after ART (
fresh or frozen
embryo transfer after IVF or ICSI treatment with their own gametes) during 1999 at five infertility clinics in Finland (Helsinki University Central Hospital, the Family Federation in Helsinki, Oulu and Turku — representing South, West and North Finland, respectively — and Helsinki Deaconess Institute) were offered information about this study.
Treatment variables were number of previous unsuccessful treatments (
fresh or frozen
embryo transfers, categorized as 0 = none, 1 = 1 — 3, 2 = 4 — 6, 3 > 6 attempts).