Restructuring healthcare services, routines and procedures on reproductive medicine based on respect for differences.

Although the term homosexuality was removed from the International Classification of Diseases and trans identities from mental disorders, these classifications promote the pathologizing of homosexuality. The direct consequence is discrimination, which adds to the difficulty in carrying out accurate information related to the LGBT population and makes it very difficult to organize public policies suited to their needs. An important issue is related to the limited access of that population to assisted reproduction techniques, when compared to traditional families.

Hydrogel encapsulation as a handling and vitrification tool for zebrafish ovarian tissue.

Zebrafish is an important animal model, thousands lines have been developed, thus having a great need for their preservation. However, the cryopreservation of fish oocytes is still limited and needs improvement. The sodium alginate hydrogel, in addition to providing support for the cells, has been shown to be a potential cryoprotectant.

Post-thaw dilution of Rhamdia quelen sperm improves the reproductive success.

The aim was to evaluate the effect of a post-thaw dilution of Rhamdia quelen sperm in 1.1% NaCl (325 mOsm kg; pH 7.6; 24 °C) solution on the quality and reproductive capacity.

Spermatogonial stem cells as a therapeutic alternative for fertility preservation of prepubertal boys.

Spermatogonial stem cells, which exist in the testicles since birth, are progenitors cells of male gametes. These cells are critical for the process of spermatogenesis, and not able to produce mature sperm cells before puberty due to their dependency of hormonal stimuli. This characteristic of the reproductive system limits the preservation of fertility only to males who are able to produce an ejaculate.

Evaluation of semen parameters in semen donors in a ten-year period in the city of São Paulo.

Objective: To evaluate sperm concentration, morphology and motility of Brazilian semen donors from 1992 to 2003, in the city of São Paulo.

Methods: Retrospective study analyzing 182 donor semen samples from 1992 to 2003. The first and the second donated sample were analyzed for each donor.

Finasteride-associated male infertility.

Finasteride is a potent and specific inhibitor of the 5alpha-reductase enzyme in men. Clinical studies have shown that finasteride 1mg/day is effective for promoting hair growth in men with male pattern hair loss. However, there is a concern about the use of finasteride, especially in young fertile patients, because of its action on testosterone metabolism.

Sperm tail flexibility test: a simple test for selecting viable spermatozoa for intracytoplasmic sperm injection from semen samples without motile spermatozoa.

Purpose: The objective was to describe the results of the injection of immotile spermatozoa with flexible tails when only immotile spermatozoa are present in the semen sample.

Methods: A retrospective study was conducted to analyze the procedure results for 10 couples who participated in our intracytoplasmic sperm injection program. The sperm tail was considered flexible when it moved up and down independently of the head movement, and it was considered inflexible when the movement occurred together (tail plus head).