By 2017, many centers have adopted embryo cryopreservation as their primary IVF therapy, and perform few or no fresh embryo transfers. The two main reasons for this have been better endometrial receptivity when embryos are transferred in cycles without exposure to ovarian stimulation and also the ability to store the embryos while awaiting the results of pre-implantation genetic testing.
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The cost of an IUI is almost certainly less on a per cycle basis, but because IVF has much higher success rates and IUI is a poor option for some, the higher per cycle cost of IVF can actually be more affordable in the long run – in terms of the cost to bring home a baby. Because most successful IUIs happen in the first three or four-cycle, it eventually becomes very expensive to bring home a baby with an IUI.
Odds of multiples. Because more than one embryo may be placed in your uterus, your chance of having twins or more is about 20 percent. Though many couples consider this a blessing, multiple fetuses increase your risk of miscarriage and other complications, such as preterm labor. Some doctors will advise you to consider selective reduction if three or more embryos implant successfully. This is a serious decision with major emotional and psychological consequences. IVF researchers are working on techniques to prevent multiple fetuses.
A 2013 review and meta analysis of randomised controlled trials of acupuncture as an adjuvant therapy in IVF found no overall benefit, and concluded that an apparent benefit detected in a subset of published trials where the control group (those not using acupuncture) experienced a lower than average rate of pregnancy requires further study, due to the possibility of publication bias and other factors.
While PGD was originally designed to screen for embryos carrying hereditary genetic diseases, the method has been applied to select features that are unrelated to diseases, thus raising ethical questions. Examples of such cases include the selection of embryos based on histocompatibility (HLA) for the donation of tissues to a sick family member, the diagnosis of genetic susceptibility to disease, and sex selection.
^ Manheimer E, van der Windt D, Cheng K, Stafford K, Liu J, Tierney J, Lao L, Berman BM, Langenberg P, Bouter LM (2013). "The effects of acupuncture on rates of clinical pregnancy among women undergoing in vitro fertilization: a systematic review and meta-analysis". Human Reproduction Update. 19 (6): 696–713. doi:10.1093/humupd/dmt026. PMC 3796945. PMID 23814102.
Sometimes problems getting pregnant for a second or subsequent time are related to a complication that occurred in a prior pregnancy or prior to delivery (damage to the uterus, for instance). But most often, secondary infertility is caused by the same factors that would cause primary infertility — issues like advanced age, obesity, ovulation problems and so on.