Carlos Simón

Endometrial regeneration is mediated, at least in part, by the existence of a specialized somatic stem cell (SSC) population recently identified by several groups using the side population (SP) technique. We previously demonstrated that end…

Implantation of a retrogradely shed endometrium during menstruation requires an adequate blood supply, which allows the growth of endometriotic lesions. This suggests that the development of endometriosis can be impaired by inhibiting angio…

OBJECTIVE: To assess whether dopamine receptor 2 agonists reduced the size of peritoneal lesions in women with endometriosis and elucidate whether affectation of vascular endothelial growth factor (VEGF)/VEGF receptor 2 (VEGFR2)-dependent a…

During reproductive life, the human endometrium undergoes around 480 cycles of growth, breakdown and regeneration should pregnancy not be achieved. This outstanding regenerative capacity is the basis for women's cycling and its dysfunction …

Previous studies in an experimental mouse model of endometriosis have shown that the dopamine agonist (DA) cabergoline (Cb2) reduces angiogenesis and endometriotic lesions, hypothetically binding to the dopamine receptor type-2 (DRD2). To d…

Introduction: Endometriosis, defined as the growth of endometrial tissue outside \nthe uterine cavity is a common gynaecological disorder affecting 10-15% \nof women in their reproductive years. It is a major clinical problem causing in- \n…

BACKGROUND: Animal studies have demonstrated better embryo development in vivo than in vitro. This pilot study tested the feasibility of using a novel in utero culture system (IUCS) to obtain normal human fertilization and embryo developmen…

Somatic stem cells (SSCs) are defined as a rare population of undifferentiated cells residing in differentiated tissues and organs. Different studies and diverse approaches suggest the presence of SSCs in human and murine endometria. Owing …

BACKGROUND: Implantation of a retrogradely-shed endometrium during menstruation requires an adequate blood supply. The endometrium has angiogenic potential, and endometriotic lesions grow in areas with a rich vascularization, suggesting tha…

Survival of newly implanted retrograde–shed endometrial tissue during menstruation in an ectopic location requires an adequate blood supply. This suggests that angiogenesis is a prerequisite for the development of endometriosis and that its…

BACKGROUND: Embryo retention in the Fallopian tube (FT) is thought to lead to ectopic pregnancy (EP), a considerable cause of morbidity. In mice, genetic/pharmacological silencing of cannabinoid receptor Cnr1, encoding CB1, causes retention…

OBJECTIVE: To provide a summary of the actual knowledge about the clinical factors affecting the oocyte recipient (other than those associated with uterine cavity abnormalities) on the outcome of oocyte donation cycles. DESIGN: Review of t…

BACKGROUND: There is a need for a reliable marker of endometriosis, especially in early stages of peritoneal disease during which imaging is not effective. The use of serum interleukin (IL)-6 as a marker is controversial. To readdress the m…

The present clinical study was conducted to investigate the effectiveness of a daily dose of 40 mg mifepristone in preventing premature LH surges in women undergoing controlled ovarian hyperstimulation (COH) for in vitro fertilization and t…

PURPOSE: To study if second day intracytoplasmic sperm injection (ICSI) results in chromosomal abnormalities in the embryos. METHODS: Rescue ICSI was performed on 14 metaphase II (MII) oocytes after unsuccessful conventional IVF, four were…

The leptin system has been implicated in reproductive function, acting at endocrine and paracrine levels. Recently, deregulation of this gene family has been linked to endometrial changes caused by endometriosis. In the present study, we co…