Search results for "Reproduction"

Multidimensional social capital in new ventures

2013

This paper analyzes and provides empirical evidence on how three different dimensions of social capital (structural, relational, and resources) have a direct causal relation on the performance of financial service start-ups. To this end, a structural equation model is estimated and validated from a database, including information from 142 Argentinean entrepreneurs who answered a questionnaire specifically designed for this research. The main finding of the paper is that the main source of value of social capital for an entrepreneur is the existence of high-quality links. Moreover, the quality of the entrepreneur's links is even more important than their quantity. This conclusion has relevan…

Management of Infertility: A Practical Approach

2022

Management of Infertility: A Practical Approach offers an accurate and complete reference for the management of infertility and a robust step-by-step guide for assisted reproduction technologies (ARTs), including how to plan, design and organize a clinical setting and laboratory. The book also provides an evidence-based, complete and practical description of the available methods for diagnosis and management of male and female infertility. This will be an ideal resource for researchers, students and clinicians who want to gain complete knowledge about both basic and advanced information surrounding the diagnosis and management of infertility and related disorders.

Antioxidants may protect against infertility.

1998

ADVERSE EFFECTS OF GONADOTROPINS USED IN INFERTILITY TREATMENT

2019

Introduction: Infertility represents a problem for more and more couples all over the world, including in Romania. Thus, more and more women need to resort to drugs to treat infertility, treatments which are not without adverse reactions (Boivin et al., 2007). Modern therapy brings significant benefits in the treatment of infertility. Despite all the benefits, the controlled ovarian stimulation treatment does not lack the possibility of adverse reactions to the administered drugs.
 Objectives: The aim of this study was to determine the potential adverse reactions experienced by patients during the treatment with gonadotropins followed by assisted conception
 Methods: A study was d…

A comprehensive use of ultrasound examination in infertility workup

2021

Considering the growing availability of ultrasound diagnostic methods in gynecology, its role in the infertility setting is increasing. In this review, we present an up-to-date ultrasound based diagnostic scheme in infertility workup comprising the evaluation of ovarian anatomy and function, uterine exploration, as well as tubal patency. The possibility of performing the vast majority of infertility diagnostics by ultrasound in the ambulatory settings is not only attractive and beneficial to patients, but also to health care system. Thus, it is vital for gynecologists to implement modern non-invasive ultrasound modalities in their everyday practice.

Health outcomes of children born after IVF/ICSI: a review of current expert opinion and literature

2014

The Sixth Evian Annual Reproduction (EVAR) Workshop Group Meeting was held to evaluate the impact of IVF/intracytoplasmic sperm injection on the health of assisted-conception children. Epidemiologists, reproductive endocrinologists, embryologists and geneticists presented data from published literature and ongoing research on the incidence of genetic and epigenetic abnormalities and congenital malformations in assisted-conception versus naturally conceived children to reach a consensus on the reasons for potential differences in outcomes between these two groups. IVF-conceived children have lower birthweights and higher peripheral fat, blood pressure and fasting glucose concentrations than …

Obesity and assisted reproductive technology outcomes.

2006

Obesity is a rising health problem in Western societies. It has been related to increased morbidity and mortality rates due to several pathologies. In the field of gynaecology and reproduction, obesity is associated with menstrual disorders, hirsutism, infertility, miscarriage and obstetric complications. It is known to impair human reproduction through different mechanisms such as insulin resistance, hyperandrogenism and elevated leptin levels. Weight management and dietary intervention can reverse this situation and improve reproductive function. Obesity can also impair the outcome of assisted reproductive technologies. The lower probability of a healthy live birth described in obese wome…

Assessment of the toxicity of a pesticide with a two-generation reproduction test using Daphnia magna.

2000

Abstract Daphnia magna (F 0 generation) were exposed during 21 days to different diazinon concentrations. Offspring (animals from the first and third brood: F 1 (1st) and F 1 (3rd), respectively) were transferred to a free pesticide medium during a 21-day recovery period. The algae Nannochloris oculata (5×10 5 cells/ml) were used as food. In this recovery study, survival, growth and reproduction (mean total young per female, mean brood size, onset of reproduction and mean number broods per female) were assessed as individual parameters, and the intrinsic rate of natural increase ( r ) as population parameter for F 1 (1st and 3rd broods) daphnids. Reproduction as well as survival was still r…

Physiological Perturbations in Several Generations of Daphnia magna Straus Exposed to Diazinon

2000

Abstract Daphnia magna was exposed to sublethal diazinon concentrations (0.05, 0.1, 0.5, 0.75, and 1.0 ng/L) for 21 days. The algae Nannochloris oculata (5×10 5 cells/mL) was used to feed the daphnids. Chronic toxicity tests were carried out using neonates of F 1 (first brood) and F 1 (third brood) offspring generations from parentals (F 0 ) preexposed to the organophosphate. The effect of diazinon on survival, reproduction, and growth was monitored for the selected daphnid generations. The parameters used to evaluate pesticide effect on reproduction were mean total young per female, mean brood size, time to first reproduction, mean number broods per female, and intrinsic rate of natural in…

Gold-nanoparticles ingestion disrupts reproduction and development in the German cockroach.

2015

The present work shows the effects of gold nanoparticles (AuNPs) orally administered on reproduction and development of the insect Blattella germanica. Newly emerged females were provided with food containing AuNPs (87.44μg/g) of a size between 15 and 30nm (mean 21.8nm), and were allowed to mate with males. Food ingestion, mortality, reproductive parameters (time to ootheca formation and eclosion, ootheca viability and fertility) as well as postembryonic developmental parameters of the first ootheca (nymphal survival and life span) were recorded throughout the experiment. Gold from AuNPs was accumulated by adults of B. germanica with a bioaccumulation factor of 0.1. Ingestion of AuNPs did n…