Effect of SeaFeed, a canola oil infused with , on methane emissions, animal health, performance, and carcass characteristics of Angus feedlot cattle.

The objectives of this project were to measure the effect of SeaFeed, a canola oil infused with , on methane emissions, animal health, performance, and carcass characteristics of feedlot cattle. Angus steers ( = 160) with an initial body weight of 474.4 kg were fed a steam-flaked wheat and barley ration for 200 d in a large, commercial feedlot.

Development of a single-visit protocol for the management of pregnancy of unknown location following in vitro fertilization: a retrospective study.

Study Question: Can women with pregnancy of unknown location (PUL) following in vitro fertilization (IVF) be risk-stratified regarding the subsequent need for medical intervention, based on their demographic characteristics and the results of serum biochemistry at the initial visit?

Summary Answer: The ratio of serum hCG to number of days from conception (hCG/C) or the initial serum hCG level at ≥5 weeks' gestation could be used to estimate the risk of women presenting with PUL following IVF and needing medical intervention during their follow-up.

What Is Known Already: In women with uncertain conception dates presenting with PUL, a single serum hCG measurement cannot be used to predict the final pregnancy outcomes, thus, serial levels are mandatory to establish a correct diagnosis. Serum progesterone levels can help to risk-stratify women at their initial visit but are not accurate in those taking progesterone supplementation, such as women pregnant following IVF.

Ethically cleared to launch?

Rules are needed for human research in commercial spaceflight.

Managing a new diagnosis of interstitial lung disease in pregnancy.

Interstitial lung disease (ILD) presents rarely in pregnancy. Reports have associated disease activity with higher rates of preeclampsia, preterm births and fetal loss. This case report describes a patient presenting in her fifth pregnancy with worsening dyspnoea.

Cardiac Effects of Long-Duration Space Flight.

Background: Ventricular mass responds to changes in physical activity and loading, with cardiac hypertrophy after exercise training, and cardiac atrophy after sustained inactivity. Ventricular wall stress (ie, loading) decreases during microgravity. Cardiac atrophy does not plateau during 12 weeks of simulated microgravity but is mitigated by concurrent exercise training.

To Fight or to Flee? A Systematic Review of Ectopic Pregnancy Management and Complications During the Covid-19 Pandemic.

Background/aim: During the COVID-19 pandemic, concerns regarding theoretical risks of surgery contributed to changes in clinical management to prevent contamination. We looked at the effect the pandemic had on the management of ectopic pregnancy. Our review compares published data on pre-COVID to COVID management of ectopic pregnancies and evaluates the differences where Early Pregnancy Unit (EPU) structures exist.

Impact of severe acute respiratory syndrome coronavirus 2 on ectopic pregnancy management in the United Kingdom: a multicentre observational study.

Objective: To describe the impact of coronavirus disease 2019 (COVID-19) on the management of women with ectopic pregnancy.

Design: A multicentre observational study comparing outcomes from a prospective cohort during the pandemic [COVID-19-ectopic pregnancy registry (CEPR)] compared with a historical pre-pandemic cohort [non-COVID-19-ectopic pregnancy registry (NCEPR)].

Setting: Five London university hospitals.

Exploring women's attitudes, knowledge, and intentions to use oocyte freezing for non-medical reasons: A systematic review.

Introduction: Women are postponing childbearing and preventing age-related fertility decline with oocyte freezing for non-medical reasons (OFNMR). The objective of this systematic evaluation was to gain an understanding of women's attitudes and knowledge of, and intentions to use OFNMR among users of OFNMR and the general public.

Material And Methods: A systematic search of MEDLINE, EMBASE, and PyschINFO databases was undertaken, for studies that examined the psychosocial attitudes among women toward OFNMR.

Arterial structure and function during and after long-duration spaceflight.

Spaceflight missions expose astronauts to increased risk of oxidative stress and inflammatory damage that might accelerate the development of asymptomatic cardiovascular disease. The purpose of this investigation was to determine whether long-duration spaceflight (>4 mo) results in structural and functional changes in the carotid and brachial arteries. Common carotid artery (CCA) intima-media thickness (cIMT), CCA distensibility and stiffness, and brachial artery endothelium-dependent and -independent vasodilation were measured in 13 astronauts (10 men, 3 women) ~180 and 60 days before launch, during the mission on ~15, 60, and 160 days of spaceflight, and within 1 wk after landing.

The cost-effectiveness of an HCV outreach intervention for at-risk populations in London, UK.

Background: HCV disproportionately affects marginalized communities such as homeless populations and people who inject drugs (PWID), posing a challenge to traditional health services. The HepFriend initiative in London is a model of care utilizing HCV outreach screening and peer support to link vulnerable individuals to HCV treatment in secondary care.

Objectives: To assess the cost-effectiveness of the HepFriend initiative from a healthcare provider perspective, compared with standard-of-care pathways (consisting of testing in primary care and other static locations, including drug treatment centres, and linkage to secondary care).

Impact of Prolonged Spaceflight on Orthostatic Tolerance During Ambulation and Blood Pressure Profiles in Astronauts.

Background: Astronauts returning to earth usually demonstrate reduced orthostatic tolerance when assessed on a tilt table or quiet standing, but no studies have evaluated postflight orthostatic tolerance during activities of daily living, when it is most clinically relevant. Ambulatory blood pressure (BP) variability also is associated with orthostatic intolerance in certain patient populations and can capture clinically significant orthostatic hypotension during activities of daily living, especially when measured on a beat-to-beat basis. We evaluated the impact of prolonged spaceflight on orthostatic tolerance and BP profiles in astronauts.

Investigating attitudes towards oocyte donation amongst potential donors and the general population: a systematic review.

With a current shortage of oocyte donors in the United Kingdom (UK), the psychological factors determining intentions to donate oocytes are important to understand. The objectives of this review were to explore psychosocial aspects of potential oocyte donors, including attitudes, motivations, as well as any issues surrounding potential donor disclosure and anonymity. A systematic search of English peer-reviewed journals of three computerized databases following PRISMA guidelines was conducted.

Investigating knowledge and perceptions of egg sharing among healthcare professionals in the United Kingdom.

Objective: This study aims to determine the healthcare professionals knowledge and opinions of egg sharing and does this potentially effect egg sharing numbers in the UK?

Study Design: 304 healthcare professionals undertook a large, in-depth survey about various topics related to egg sharing. This included ranking key benefits and issues related to egg sharing. Statistical analysis was performed using SPSS.

Internal jugular pressure increases during parabolic flight.

One hypothesized contributor to vision changes experienced by >75% of International Space Station astronauts is elevated intracranial pressure (ICP). While no definitive data yet exist, elevated ICP might be secondary to the microgravity-induced cephalad fluid shift, resulting in venous congestion (overfilling and distension) and inhibition of cerebrospinal and lymphatic fluid drainage from the skull. The objective of this study was to measure internal jugular venous pressure (IJVP) during normo- and hypo-gravity as an index of venous congestion.

Orthostatic Intolerance After ISS and Space Shuttle Missions.

Introduction: Cardiovascular deconditioning apparently progresses with flight duration, resulting in a greater incidence of orthostatic intolerance following long-duration missions. Therefore, we anticipated that the proportion of astronauts who could not complete an orthostatic tilt test (OTT) would be higher on landing day and the number of days to recover greater after International Space Station (ISS) than after Space Shuttle missions.

Methods: There were 20 ISS and 65 Shuttle astronauts who participated in 10-min 80° head-up tilt tests 10 d before launch, on landing day (R+0), and 3 d after landing (R+3).

Left ventricular remodeling during and after 60 days of sedentary head-down bed rest.

Short periods of weightlessness are associated with reduced stroke volume and left ventricular (LV) mass that appear rapidly and are thought to be largely dependent on plasma volume. The magnitude of these cardiac adaptations are even greater after prolonged periods of simulated weightlessness, but the time course during and the recovery from bed rest has not been previously described. We collected serial measures of plasma volume (PV, carbon monoxide rebreathing) and LV structure and function [tissue Doppler imaging, three-dimensional (3-D) and 2-D echocardiography] before, during, and up to 2 wk after 60 days of 6° head down tilt bed rest (HDTBR) in seven healthy subjects (four men, three women).

Understanding stress in the healthy animal - potential paths for progress.

Although stress is usually associated with disease, the physiological and behavioral responses to stressors are critical mechanisms of resilience for healthy organisms. A recent workshop comprised of researchers who study healthy humans and both free-living and captive non-human animals identified a number of key roadblocks that are impeding progress in understanding how stress responses integrate into the normal physiology of an animal. These include the lack of: (1) an unambiguous definition of a stress phenotype; (2) a robust biomarker, or suite of biomarkers, to indicate that phenotype; (3) theoretical and quantitative models to predict how humans and other animals will react to stressors; (4) a comprehensive understanding of how individual variability in stress responses arise and (5) an understanding of the transitions between acute and chronic stress responses.

Curtain eruptions from Enceladus' south-polar terrain.

Observations of the south pole of the Saturnian moon Enceladus revealed large rifts in the south-polar terrain, informally called 'tiger stripes', named Alexandria, Baghdad, Cairo and Damascus Sulci. These fractures have been shown to be the sources of the observed jets of water vapour and icy particles and to exhibit higher temperatures than the surrounding terrain. Subsequent observations have focused on obtaining close-up imaging of this region to better characterize these emissions.

Effects of sex and gender on adaptation to space: cardiovascular alterations.

Sex and gender differences in the cardiovascular adaptation to spaceflight were examined with the goal of optimizing the health and safety of male and female astronauts at the forefront of space exploration. Female astronauts are more susceptible to orthostatic intolerance after space flight; the visual impairment intracranial pressure syndrome predominates slightly in males. Since spaceflight simulates vascular aging, sex-specific effects on vascular endothelium and thrombotic risk warrant examination as predisposing factors to atherosclerosis, important as the current cohort of astronauts ages.

Fetal programming of adult Leydig cell function by androgenic effects on stem/progenitor cells.

Fetal growth plays a role in programming of adult cardiometabolic disorders, which in men, are associated with lowered testosterone levels. Fetal growth and fetal androgen exposure can also predetermine testosterone levels in men, although how is unknown, because the adult Leydig cells (ALCs) that produce testosterone do not differentiate until puberty. To explain this conundrum, we hypothesized that stem cells for ALCs must be present in the fetal testis and might be susceptible to programming by fetal androgen exposure during masculinization.

Gradient compression garments protect against orthostatic intolerance during recovery from bed rest.

Introduction: Abdomen-high, lower body graded compression garments (GCGs) may represent the next-generation of orthostatic intolerance protection with applications for exploration missions and commercial space flight.

Purpose: To evaluate the efficacy of the GCG to prevent orthostatic intolerance after a 14-day 6° head-down tilt bed rest (BR) and to determine whether wearing thigh-high compression garments impairs recovery from BR.

Methods: Sixteen (12 M, 4 F) subjects participated in a 15-min 80° head-up tilt test 5 day before BR (BR-5), on the last morning of BR (BR+0), and on day 1 (BR+1) and 3 after BR (BR+3).

Abdomen-high elastic gradient compression garments during post-spaceflight stand tests.

Unlabelled: Space Shuttle astronauts wore an inflatable antigravity suit during reentry and landing, and astronauts and cosmonauts wear an elastic-compression garment (with lacing) during Soyuz re-entry and landings and in the first few days of recovery. However, neither garment is an ideal countermeasure to spaceflight-induced orthostatic intolerance. Our laboratory has been investigating an elastic graded compression garment (GCG) that applies graduated pressures from the feet to the abdomen for use following International Space Station missions and possibly during exploration missions.

Sex differences in blood pressure control during 6° head-down tilt bed rest.

Spaceflight-induced orthostatic intolerance has been studied for decades. Although ∼22% of the astronaut corps are women, most mechanistic studies use mostly male subjects, despite known sex differences in autonomic control and postflight orthostatic intolerance. We studied adrenergic, baroreflex, and autonomic indexes during continuous infusions of vasoactive drugs in men and women during a 60-day head-down bed rest.