Natural hybridization is increasingly recognized as an important process for the ecology and evolution of natural plant populations and species. There is a great need to initiate more studies based on natural populations in order to elucidate the possible role of hybrids in nature. The reproductive success of early generation hybrids can make or break hybrid lineages and may determine the genet...

Salix variegata Franch, a prominent plant applied in riparian shelter vegetation in Three Gorges reservoir region of China, produces many seeds every year but generates only a few or no seedlings. Whether the low seedling production of S. variegata is caused by seed sterility or by rapid loss of seed viability remains unknown. We investigated the sojourn time of mature seeds in capsules produce...

The stinkbug Supputius cincticeps (Stål) (Heteroptera: Pentatomidae) can be found in agricultural and forest ecosystems feeding primarily on larvae of Coleoptera and Lepidoptera, where it can be exposed to insecticide applications. This study therefore aimed to evaluate the reproductive potential of S. cincticeps after exposition to sublethal doses of permethrin (5.74 x 10(-3), 5.74 x 10(-2), 5...

Gametogenesis and the temporal changes occurring in the ovaries and testes throughout the reproductive cycle in the invasive alien bivalve, Chinese pond mussel Sinanodonta woodiana (Lea), from the heated Konin lakes system (central Poland) were studied using histological techniques. S. woodiana was confirmed to be a gonochoristic species with overall sex ratio of 1:1. The examined morphological...

Johns Hopkins Medical Center, located in Baltimore, Maryland, opened in 1889; its associated medical school opened four years later. Today the hospital, a leading research center, contains many departments, including a fertility center that is renowned for taking on difficult cases that have been rejected by other fertility clinics. The fertility center was founded by physician Georgeanna Seega...

The challenge of remoteness is an issue for both patients and clinicians in regional, rural and remote areas of Australia with limited attention having been paid to the needs for currency maintenance and enhancement of competency of practice nurses (PNs) in providing sexual and reproductive health (S&RH) education following initial formal preparation for these roles. This paper presents researc...

OBJECTIVE To examine the association between low serum vitamin D concentration and estimates of male reproductive function. DESIGN Cross-sectional study. SETTING University hospital. PATIENT(S) From a Danish pregnancy cohort established in 1984-1987, 347 sons were selected for a study conducted in 2005-2006. INTERVENTION(S) Semen parameters and reproductive hormones were related to vita...

OBJECTIVE To assess whether total reproductive potential (TRP), the chance of a live birth from each fresh cycle (fresh cycle plus frozen transfers), could be calculated from the national Society for Assisted Reproductive Technology Clinic Outcome Reporting System (SART CORS) database and whether information not available in SART CORS resulted in significant changes to the TRP calculation. DE...

OBJECTIVE To describe a unique congenital müllerian anomaly. DESIGN Case report. SETTING A university-based reproductive endocrine center. PATIENT(S) Five reproductive-age, nulligravida patients who underwent clinical, radiologic, and surgical work-up. INTERVENTION(S) Retrospective review of prior medical records and studies. MAIN OUTCOME MEASURE(S) Definition of abnormal pelvic anato...

OBJECTIVE To determine whether developing hypothyroidism after cancer treatment is associated with a decreased probability of women being able to meet their reproductive goals. DESIGN A population-based cohort study. SETTING Not applicable. PATIENT(S) A total of 1,282 cancer survivors, of whom 904 met the inclusion criteria for the analysis. INTERVENTION(S) None. MAIN OUTCOME MEASURE(...