BACKGROUND In order to optimize IVF strategies, particularly with the use of single embryo transfer, good predictive models are required. Here, we develop a model to allow such prediction, and the structure of the models point to more general conclusions about the mode of action of prognostic factors. METHODS Anonymized data from consecutive embryo transfers in five IVF centres in the UK for ...

BACKGROUND Recipients of donor oocytes need to be synchronized to the donor's cycle if fresh embryos are to be transferred on the cycle of oocyte retrieval. It would be much easier to merely retrieve the oocytes from the donor, fertilize the oocytes with the recipient's male partner's spermatozoa, cryopreserve the embryos, then transfer on an oestrogen/progesterone treatment programme. METHOD...

The aim of the study was to compare the single pregnancy and neonate outcome after fresh and frozen-thawed embryo transfer in the in vitro fertilization programme (IVF). The study focused on clinical and laboratory factors affecting the abnormal placentation, especially placenta praevia, in patients conceiving in the IVF programme. The results confirm that neonates born after frozen-thawed embr...

OBJECTIVE This study aims to evaluate the effectiveness of GnRH agonist in comparison with hCG for triggering final oocyte maturation in endometrial preparation of letrozole stimulation protocols for frozen-thawed embryo transfer. METHODS The frozen-thawed embryo transfer cycles (FET) that use the letrozole stimulation protocols for endometrial preparation were divided into two groups accordi...

OBJECTIVE It is well known that fresh blastocyst transfer results in better pregnancy outcomes with a smaller number of transferred embryos compared with cleavage stage embryo transfer. However, in terms of frozen-thawed blastocyst transfer, only a few studies are available. We aimed to evaluate clinical outcomes of frozen-thawed embryo transfer (FET) with blastocysts. METHODS Retrospective a...

background: the use of assisted reproductive technology (art) is increasing in the world. the rate, efficacy and safety of art are very different among countries. there is an increase in the use of intra cytoplasmic sperm injection (icsi), single fresh embryo transfer (et) and frozen-thawed embryo transfer (fet). objective: the objective of this study was to compare pregnancy rate in fresh et a...

Ovarian stimulation followed by oocyte aspiration has facilitated a number of cryopreservation techniques. Embryo cryopreservation has become a well-established and highly endorsed form of fertility preservation in young female cancer patients (American Society for Reproductive Medicine, American Society of Clinical Oncology, European Society of Human Reproduction and Embryology, British Fertil...

To investigate the effects of the frozen embryo transplantation for patients with poor outcome of endometrial growth by using growth hormone intrauterine perfusion combined with replacement cycle in the treatment of non-response thin endometrium. This is a prospective study and study participants were consecutively recruited between Jun 2014 and December 2014. A total of 5 non-response thin end...