Examining extended human leukocyte antigen-G and HLA-F haplotypes: the HLA-G UTR-4 haplotype is associated with shorter time to pregnancy in an infertility treatment setting when both female and male partners are carriers.

Objective: To study the impact of extended human leukocyte antigen (HLA)-G and HLA-F haplotypes on time to pregnancy as measured by the number of treatment cycles in a cohort of couples in infertility treatment.

Design: Prospective cohort study of couples undergoing infertility treatment.

Setting: University hospital.

Soluble urokinase plasminogen activator receptor (suPAR) as a biomarker of early pregnancy location and viability compared with hCG, progesterone and estradiol.

A circulating biomarker of early pregnancy outcome independent of ultrasonography and gestational age is a coveted goal. This study evaluated soluble urokinase plasminogen activator receptor (suPAR), a well-described marker of inflammation and immunological activation, for this purpose, and compared it with established early pregnancy biomarkers of the luteoplacental phase: progesterone, estradiol and hCG. We merged data from two prospective first trimester cohorts to conduct a case-control study comparing these analytes in women who had either a live birth, a miscarriage or an ectopic pregnancy.

Variation in the HLA-F gene locus with functional impact is associated with pregnancy success and time-to-pregnancy after fertility treatment.

Study Question: The aim of this study was to investigate a possible influence of three single nucleotide polymorphisms (SNPs) in the HLA-F gene locus on time-to-pregnancy and pregnancy success after fertility treatment.

Summary Answer: HLA-F SNP genotypes and HLA-F diplotypes are associated with the number of fertility treatment cycles needed to achieve pregnancy and live birth.

What Is Known Already: HLA class Ib molecules, including HLA-F, which are known to be expressed by extra-villous trophoblast cells have immunomodulatory properties and play a role at the feto-maternal interface.

Soluble HLA-G and TGF-β in couples attending assisted reproduction - A possible role of TGF-β isoforms in semen?

Soluble isoforms of the non-classical Human Leukocyte Antigen (HLA)-G as well as Transforming Growth Factor (TGF)-β is expressed in seminal plasma possibly influencing the pregnancy potential. We wanted to examine the association of seminal plasma sHLA-G, TGF-β1, TGF-β2 and TGFβ3 with pregnancy success in a cohort of 127 couples and 4 single women attending fertility treatment with the use of assisted reproduction technologies (ART). Soluble HLA-G, TGF-β1, TGF-β2 and TGF-β3 in seminal plasma did not fluctuate significantly over time.

Serum anti-Müllerian hormone concentration before and after salpingectomy for ectopic pregnancy.

Research Question: Does salpingectomy for ectopic pregnancy affect the ovarian reserve measured by changes in pre- and post-operative levels of anti-Müllerian hormone (AMH)?

Design: This is a prospective observational multicentre study of 64 women treated with salpingectomy for an ectopic pregnancy. AMH was measured in serum samples collected at admission before salpingectomy and at follow-up (median time to follow-up [interquartile range] was 3 [3-4] months). Changes in serum AMH levels were investigated using Wilcoxon signed-rank test and the relationship between changes in AMH and age, time to follow-up, and pre-operative serum AMH level was investigated using linear regression analysis.

Implications of uterine NK cells and regulatory T cells in the endometrium of infertile women.

A range of studies have shown that the complex process of implantation and an establishment of a pregnancy also involves immune factors. Disturbances in these underlying immune mechanisms might lead to implantation and pregnancy failure and may be involved in the pathogenesis of unexplained infertility. Several studies have reported that imbalances in uterine NK (uNK) cell abundance are associated with infertility; however, controversies exist.

Endometrial immune markers are potential predictors of normal fertility and pregnancy after in vitro fertilization.

Problem: Elucidating immune mechanisms in the endometrium, which lead to the success of implantation and pregnancy, is important in reproductive medicine. Studies of immune cell abundance have shown conflicting results, and the expression and importance of HLA class Ib proteins in pre-implantation endometrium have not yet been investigated.

Method Of Study: The study population consisted of four subgroups: a hydrosalpinx, a salpingectomy, an unexplained infertility, and a fertile control group.

Soluble human leukocyte antigen-G in seminal plasma is associated with HLA-G genotype: possible implications for fertility success.

Problem: We have previously shown that human seminal plasma contains immunomodulatory soluble HLA-G (sHLA-G). We investigated whether sHLA-G levels in seminal plasma are associated with a specific 14 base pair (bp) insertion/deletion (ins/del) polymorphism in the 3'-untranslated region of the HLA-G gene and/or with the outcome of assisted reproduction treatments (ART) in couples attending a fertility clinic.

Method Of Study: In a total of 54 unselected couples, sHLA-G levels were measured in seminal plasma samples and blood samples, HLA-G genotyping was performed, and clinical data were collected.

Recent progress in the utility of anti-Müllerian hormone in female infertility.

Purpose Of Review: To discuss the recent developments in the utility of anti-Müllerian hormone (AMH) in the context of female infertility.

Recent Findings: AMH measurements have entered the clinical practice in counseling of women before in-vitro fertilization (IVF) treatment. AMH measurements can predict both poor and hyperresponse, and can enable clinicians to individualize the treatment strategies.

Anti-Müllerian hormone levels in salpingectomized compared with nonsalpingectomized women with tubal factor infertility and women with unexplained infertility.

Objective: To investigate the consequence of salpingectomy on ovarian reserve by measuring anti-Müllerian hormone (AMH) levels before in vitro fertilization (IVF) treatment in salpingectomized women compared with nonsalpingectomized women with tubal factor infertility, women with unexplained infertility and fertile control women, and to evaluate whether AMH levels could predict IVF outcome.

Design: Cross-sectional study extended from a previous prospective study.

Setting: Four university fertility clinics.

The role of anti-Müllerian hormone in female fertility and infertility - an overview.

Anti-Müllerian hormone (AMH) plasma levels reflect the continuous non-cyclic growth of small follicles, thereby mirroring the size of the resting primordial follicle pool and thus acting as a useful marker of ovarian reserve. Anti-Müllerian hormone seems to be the best endocrine marker for assessing the age-related decline of the ovarian pool in healthy women; thus, it has a potential ability to predict future reproductive lifespan. The most established role for AMH measurements is before in vitro fertilization is initiated, because AMH can be predictive of the ovarian response, namely poor and hyper-responses.

Human leukocyte antigen-G in the male reproductive system and in seminal plasma.

One of the non-classical human leukocyte antigen (HLA) class Ib proteins, HLA-G, is believed to exert important immunoregulatory functions, especially during pregnancy. The presence of HLA protein in paternal seminal fluid has been suggested to have an influence on the risk of developing pre-eclampsia. We have investigated whether HLA-G protein is present in human seminal plasma and in different tissue samples of the male reproductive system.

Glycodelin in endometrial flushing fluid and endometrial biopsies from infertile and fertile women.

Objective: To investigate in the natural cycle just before IVF, whether glycodelin levels in endometrial flushing fluid obtained days LH+1 and LH+7 can be used in predicting pregnancy in the following IVF cycle, and whether there are differences in women with tubal factor infertility compared to women with unexplained infertility and fertile controls.

Study Design: A prospective observational multicentre study of 21 fertile and 75 infertile women (25 showed abnormal tubes with no signs of hydrosalpinges, 18 had uni- or bi-lateral hydrosalpinges, 17 were salpingectomised because of hydrosalpinges, and 15 women had unexplained infertility). Endometrial flushing at days LH+1 and LH+7, endometrial biopsy, and blood sampling at day LH+7 were performed before down-regulation for IVF.

Ultrasound characteristics and histological dating of the endometrium in a natural cycle in infertile women compared with fertile controls.

Objective: To compare endometrial dating and ultrasound texture in a natural cycle before IVF and relate these to outcome and to fertile references.

Design: Prospective study with a fertile reference group.

Setting: Four university IVF clinics.

Cost--effectiveness analysis of salpingectomy prior to IVF, based on a randomized controlled trial.

Background: In patients with ultrasound-visible hydrosalpinges, salpingectomy prior to IVF increases the chance of a live birth. This study compared the cost-effectiveness of this strategy (intervention) with that of optional salpingectomy after a failed cycle (control).

Methods: Data from a Scandinavian randomized controlled trial were used to calculate the individual number of treatments and their outcomes.

HLA-G and IL-10 in serum in relation to HLA-G genotype and polymorphisms.

The expression and importance of the non-classical human leukocyte antigen (HLA) class Ib gene, HLA-G, at the feto-maternal interface have been recognized. The HLA-G molecule is almost monomorphic and expressed in both membrane-bound and soluble isoforms. It has been shown to inhibit NK-mediated cell lysis and influence cytokine expression.

Biochemical evaluation of endometrial function at the time of implantation.

Objective: To review the literature on various endometrial factors assumed to be of importance to implantation and to evaluate their potential clinical value in the assessment of endometrial function at the time of implantation in infertile women in natural and stimulated cycles.

Design: Literature review.

Result(s): Cytokines such as leukemia inhibitory factor, colony-stimulating factor-1, and interleukin-1 have all been shown to play important roles in the cascade of events that leads to implantation.

Why does hydrosalpinx reduce fertility? The importance of hydrosalpinx fluid.

The debate on hydrosalpinx and impaired IVF outcome has mainly focused on the best treatment before IVF and on functional surgery as an alternative treatment. We would like to initiate a debate on the possible reasons why the outcome is impaired. We know that salpingectomy is effective in terms of improved birth rates after IVF, but we do not know exactly why.

A Wallace malleable stylet for difficult embryo transfer in an in vitro fertilization program: a case-control study.

Background: The aim of the study was to evaluate the impact of using a Wallace malleable stylet in combination with an Edwards-Wallace embryo replacement catheter in case of difficult embryo transfer (ET).

Methods: A retrospective case-control study was used. The standard ET procedure at the clinic was to use a single tooth tenaculum, and a speculum to straighten the cervical canal prior to inserting the Edwards-Wallace embryo replacement catheter.