Decreased Toll-like Receptor (TLR) 2 and 4 Expression in Spermatozoa in Couples with Unexplained Recurrent Spontaneous Abortion (URSA).

Studies have shown that toll-like receptors (TLRs) play some important roles in reproductive processes such as ovulation, spermatogenesis, sperm capacitation, fertilization, and pregnancy to the best of our knowledge, no study has evaluated the expression and role of these molecules and their impairment in spermatozoa; accompanied by pregnancy complications such as recurrent spontaneous abortion (RSA). Therefore, this study investigates the alteration of toll-like receptor 2 (TLR2) and toll-like receptor 4 (TLR4) expression in spermatozoa in men whose spouse have unexplained RSA. Fifteen fertile couples and fifteen couples with unexplained recurrent spontaneous abortion (URSA) were included in this study.

Can the Decreased Expression of Human Leukocyte Antigen Class Ⅰ and Ⅱ by Spermatozoa Lead to Recurrent Spontaneous Abortion?

Background & Objective: Unexplained recurrent spontaneous abortion (URSA) is defined as an unknown cause of occurrence of three or more clinically detectable pregnancy losses before 20 weeks of gestation, but it occurs presumably as a result of the immune system dysfunctions. We supposed that the disruption of semen or spermatozoa might be responsible for the dysfunction of the immune system in women with URSA. Semen and spermatozoa (as antigens) induce female reproductive tract (FRT) immunity.

Gene expression analysis of membrane progesterone receptors in women with recurrent spontaneous abortion: a case control study.

Objective: Recurrent spontaneous abortion (RSA) is a condition which is defined as three consecutive pregnancy losses prior to 20 weeks from the last menstrual period. Progesterone is a steroid hormone that has an essential role in the implantation and maintenance of pregnancy. The progesterone signaling is performed by nuclear progesterone receptors (NPRs) and membrane progesterone receptors (mPR).

The expression of human leukocyte antigen by human ejaculated spermatozoa.

Background: After coitus and insemination, an inflammatory response is evident in the female reproductive tract (FRT). Semen contains a variety of immune-activating components that have a major role in the induction of an immune response in the FRT. One of the most important is (human leukocyte antigen) HLA molecules which are present in soluble form in seminal plasma and in membrane form on the surface of cells (such as epithelial and leukocytes) existing in semen.

Variations in T-helper 17 and Regulatory T Cells during The Menstrual Cycle in Peripheral Blood of Women with Recurrent Spontaneous Abortion.

Background: Disorders in immune system regulation may result in pregnancy abnormalities such as recurrent spontaneous abortion (RSA). This study aims to determine the ratio of regulatory T (Treg) and T helper (Th) 17 cells in unexplained RSA (URSA) women during proliferative and secretory phases of their menstrual cycles compared to healthy non-pregnant women.

Materials And Methods: In this case control study, 25 women with URSA and 35 healthy, non-pregnant women were enrolled.

Fat-modified diets during pregnancy and lactation and serum lipids after birth.

Objective: This study investigated the influence of modifying the maternal dietary fat on the serum lipids of infants at birth and at one year of age.

Methods: This single-blind randomized clinical trial was done on 180 4-month-pregnant women. All subjects proved to have a fat-unmodified diet through a 4-day food record dietary questionnaire.