BACKGROUND Frozen thawed embryo transfer (FET) is a cost-effective adjunct to IVF or IVF-ICSI treatment. In order to optimize treatment outcome, FET should be carried out during a period of optimal endometrial receptivity. To optimize implantation several methods for endometrium preparation have been proposed. In natural cycle FET (NC-FET), the endometrium develops under endogenous hormonal sti...

Objective(s) Cigarette and nicotine enhances embryogenesis, fertility, pregnancy loss and ultrastructure alterations of oocyte. This study was performed to determine the effect of daily supplementation of vitamin E on oocytes apoptosis in nicotine-treated mice. Materials and Methods In this experimental study, 24 NMARI adult female mice were randomly allocated into four experimental groups. ...

BACKGROUND LH activity may influence treatment response and outcome in IVF cycles. METHODS A randomized, assessor-blind, multinational trial compared ongoing pregnancy rates (primary end-point) in 731 women undergoing IVF after stimulation with highly purified menotrophin (HP-hMG) (n = 363) or recombinant FSH (rFSH) (n = 368) following a long GnRH agonist protocol. Patients received identical...

The endometrium contains a resident population of leukocytes, the number and subtype of which vary throughout the menstrual cycle and in early pregnancy. Factors controlling these fluctuations are unknown, but a combination of proliferation in situ and migration from the vasculature has been proposed. Locally acting inflammatory mediators, including specific chemokines and prostaglandins, have ...

Establishment of pregnancy in ruminants requires blastocyst growth to form an elongated conceptus that produces interferon tau, the pregnancy recognition signal, and initiates implantation. Blastocyst growth and development requires secretions from the uterine endometrium. An early increase in circulating concentrations of progesterone (P4) stimulates blastocyst growth and elongation in ruminan...

background: we often see patients with a thin endometrium in art cycles, in spite of standard and adjuvant treatments. improving endometrial growth in patients with a thin endometrium is very difficult. without adequate endometrial thickness these patients, likely, would not have reached embryo transfer. objective: we planned this study to investigate the efficacy of intrauterine granulocyte co...

In cattle, the majority of pregnancy loss can be attributed to early embryonic loss which occurs prior maternal recognition of pregnancy on Day 16 (Day 0 = ovulation). During this time, carefully orchestrated spatio-temporal alterations in the transcriptomic profile of the endometrium are required to drive conceptus elongation, via secretions from the endometrium (termed histotroph) and establi...

OBJECTIVE The aim of this paper is to review the evidence from studies that evaluated the relationship between vitamin D and endometriosis. DESIGN Comprehensive review. MATERIALS AND METHODS Systematic literature search in Medline for relevant publications from 1946 until June 2013. RESULTS Endometriosis risk may be influenced by dietary vitamin D intake and plasma hydroxyvitamin D concen...

Embryo implantation requires both an activated blastocyst and a receptive endometrium. The human endometrium undergoes extensive remodeling in each menstrual cycle to prepare the endometrium for implantation, should conception occur in that cycle. For most of the cycle, the endometrium is retained in a non-receptive or refractory state and it will support implantation of the blastocyst for only...

background: recurrent miscarriage (rm) affects 2-5% of pregnant women. paternal lymphocyte immunotherapy is a common treatment for rm patients but the outcome has not been consistent. therefore, combined therapy with other immunosuppressive drugs such as 1 a, 25-dihydroxy-vitamin-d3 (vitamin d3) may improve the outcome. objectives: to investigate the effect of vitamin d3 on the balance of two e...