Production cross sections of Rh and Ag in proton bombed Pb target with 400 MeV energy.

The accelerator-driven subcritical system (ADS) is a competitive option for next-generation nuclear energy systems. Production cross sections of long-lived residual radioactive nuclides in a proton-nuclide reaction are basic quantities for the calculation of accumulated radioactivity in the use of ADS systems. This work presents the production cross sections of Rh and Ag in a natural lead (Pb) target activated by 400 MeV protons.

[Analysis of 21 723 Pregnant Women's First Trimester Screening for Down Syndrome in Sichuan Province].

Objective: To compare the effect of different first-trimester screening programmes for Down syndrome in Sichuan Province.

Methods: We retrospectively collected the data of singleton pregnancies that were screened by serum biochemistry markers combined with nuchal translucency screening tests in the first trimester in Prenatal Diagnosis Center of West China Second University Hospital of Sichuan University from January 2011 to December 2017. The fetal chromosome results were obtained by amniocentesis or by telephone follow-up.

[Effects of eight environmental endocrine disruptors on insulin resistance in patients with polycystic ovary syndrome: a preliminary investigation].

Objective: To investigate the relationship between 8 endocrine-disrupting chemicals in the serum and insulin resistance in patients with polycystic ovary syndrome (PCOS).

Methods: This study was conducted among 60 patients with PCOS, including 23 with insulin resistance (PCOS-IR) and 37 without insulin resistance (PCOS-NIR), and 29 non-PCOS women seeking medical attention for infertility or menstrual disorder (control group). The serum levels of 6 phthalic acid esters (PEAs), bisphenol A (BPA) and octylphenol (OP) were measured in all the subjects.

[Impact of controlled ovarian hyperstimulation delayed, which occurs after functionally pituitary downregulation by depot GnRH agonist, on the outcome of in vitro fertilization and embryo transfer].

Objective: This study observed the influence on hormone, embryos and clinical outcomes when the starting time of controlled ovarian hyperstimulation (COH) was delayed after applying a half-dose depot gonadotropin-releasing hormone agonist (GnRHa).

Methods: A total 207 cycles were divided into 3 groups: control group (98 cycles, which performed daily low dose GnRHa during the mid-luteal phase in patients' menstrual cycles and reduced the dosage to a half at the next day 3, and added gonadotropin (Gn), conventional group (63 cycles, in which pituitary desensitization was obtained with a half-dose depot GnRHa in the mid-luteal phase, and then Gn was added at day 3) and delayed group (46 cycles, having the same usage of GnRHa to conventional group, but not adding Gn until day 7).

Results: The cancellation rate of cycle in conventional group was the highest (P < 0.

[The relationship between leptin, insulin-like growth factor-1 (IGF-1) and hyperinsulinemia of patients with polycystic ovarian syndrome].

Objective: To identify the effect of IGF-1 and leptin on the hyperinsulinemia (HI) of patients with polycystic ovarian syndrome (PCOS).

Methods: The case-control compared method was applied to the study. Ninety-two PCOS and 92 control subjects were involved in the study.