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A recent study has found that sperm deteriorates over time as it remains in the body, leading researchers to suggest that men who ejaculate more frequently may have better sperm quality.The study, which combined 115 human studies involving nearly 55,000 men and 56 studies on non-human species, found that the longer men went without sex, the more their sperm showed signs of DNA damage and oxidative stress, and the more tests rated the sperm as less viable and poorer swimmers.The World Health Organization (WHO) recommends men abstain from ejaculating for two to seven days before giving sperm for fertility tests or IVF, but the guidelines were designed to obtain the highest sperm count rather than prioritizing the best quality sperm.Dr. Krish Sanghvi, lead author of the study, said: "In men, the negative effects we found on sperm DNA damage and oxidative damage were large-ish, so we are confident that this is a biologically meaningful and important effect."The study's findings suggest that clinicians and couples should reconsider whether long abstinence is always good, as abstinence leads to deterioration in sperm quality.For couples trying to conceive naturally, a balance between quantity and quality needs to be struck, with abstaining for too long or too little potentially affecting sperm quality and quantity.Experts say that for assisted reproductive technology (ART) treatments, it's having the freshest, most healthy sperm that is probably more important, and that the two to seven days abstinence rule may not be as crucial when IVF treatment is taking place.

A deadly air attack has struck the pro-Iran Popular Mobilisation Forces in Iraq, as reported by Al Jazeera. The incident occurred on March 24, 2026, at 10:46:46 UTC. Details about the attack, including casualties and the perpetrator, are still under verification.

The recent developments in the Iran-US conflict have sparked concerns about the potential for a prolonged and devastating war. Iranian barrages have targeted Israel, Gulf Arab states, and northern Iraq, while Israeli and US warplanes have struck across Iran. The US has considered deploying troops on the ground, further escalating tensions.British Prime Minister Sir Keir Starmer has warned that the conflict may endure, and the economic risks are already crystallizing. Business activity growth in Britain has slowed, manufacturers' input costs have seen their sharpest rise since 1992, and home loans are becoming dearer as the war feeds into energy and inflation fears.The UK government is drawing up contingency plans, such as lowering speed limits to cut fuel use. However, Chancellor Rachel Reeves has ruled out universal household support for any 'Trumpflation' and insists help will remain within her 'iron-clad' fiscal rules. This approach has raised concerns about the government's ability to mitigate the economic impact of the conflict.The conflict has significant implications for global energy markets. Disruptions to oil and gas flows could lead to a structural shift in global energy use, with Europe potentially accelerating its green energy transition and Asia opting for increased coal use. The UK's clean energy transition may be impacted, with higher costs and disrupted supply posing challenges.In conclusion, the Iran-US conflict poses significant risks to global economic stability and energy markets. The UK government must navigate these challenges carefully, balancing the need for economic support with the imperative of maintaining fiscal discipline.

An Iranian missile has struck central Tel Aviv, causing widespread damage to buildings and vehicles, and injuring at least six people. The attack has led to a significant escalation of tensions in the region, with Israeli Prime Minister Benjamin Netanyahu vowing to continue striking Tehran and Lebanon.“There’s more to come,” Netanyahu said in remarks that appeared to corroborate those of three Israeli officials who told Reuters they thought it was improbable that Iran would accept US demands in any new round of negotiations. This development has dimmed hopes of de-escalation after US President Donald Trump played up the chances of a deal to end the conflict.In a statement released on Tuesday, Iran’s Islamic Revolutionary Guard Corps said it would launch heavy missile and drone attacks at Israeli troops in northern Israel and the area near Gaza “without restraint” unless Israel ceased attacks in Lebanon and Palestine. The threat has raised concerns about the potential for further escalation in the region.Police said an Iranian munition carrying a substantial explosive payload struck the central city, causing widespread damage to buildings and vehicles. At least six people were lightly injured. Several buildings were damaged across Tel Aviv, with emergency services reporting casualties at one of the impact sites. One building and the adjacent road were heavily affected, with cars set ablaze.Israel’s health ministry reports 4,829 injured people have been brought to hospitals since the onset of the war. Of those people, 111 remain in hospital and 12 are in a serious condition. The strikes were the latest in a cycle of retaliation after Israeli operations announced on Monday.About 40 minutes after Trump said he would delay action against Iran’s power infrastructure, Israel said on X that it had “just begun another wave of strikes targeting infrastructure of the Iranian terror regime across Tehran”. The Israel Defense Forces said energy facilities would be spared, suggesting that Israel may be aligning with Washington in suspending attacks on Iranian power plants and related sites.The US-based Human Rights Activists’ News Agency said in the previous 24 hours it had recorded at least 206 attacks across 15 provinces in Iran, resulting in at least four casualties (killed and injured, both civilian and military). At least six people were killed in strikes on homes in the city of Tabriz, according to Iran’s Fars news agency.Since US-Israeli bombs started falling on Iran, estimates of total deaths (military and civilian) in the country have exceeded 1,500, with some rights groups reporting figures as high as 3,230 as of 21 March. The escalation has also spilled beyond Israel, with Iranian strikes extending into Gulf states.

The ongoing conflict in the Middle East has taken a significant turn as foreign ministers from Arab and Muslim countries gathered in Riyadh for urgent discussions. The meeting, which included representatives from 12 countries, aimed to muster a common response to Iran's increasing retaliation against US assets and infrastructure in the region.The talks were held as Iran targeted several energy facilities across Saudi Arabia, the United Arab Emirates, and Qatar in retaliation against Israel's strike on the South Pars gasfield, Iran's biggest source of energy. This escalation comes after a series of Israeli assassinations of top Iranian security officials.The joint statement issued on Thursday confirmed that the countries present at the meeting, including Qatar, Azerbaijan, Bahrain, Egypt, Jordan, Kuwait, Lebanon, Pakistan, Saudi Arabia, Syria, Turkiye, and the United Arab Emirates, asserted the right of states to defend themselves, citing Article 51 of the United Nations Charter on defensive action.The foreign ministers condemned deliberate Iranian attacks with ballistic missiles and drones that have struck various targets, including residential areas, water desalination plants, oil facilities, airports, and diplomatic positions. They called on Iran to:Halt its attacks.Stop "provocative actions or threats" aimed at its neighbours.Cease supporting, financing, and arming pro-Iran proxy groups based in Arab states.Refrain from actions or threats aimed at blocking the Strait of Hormuz or threatening maritime security in the Bab al-Mandeb strait.The meeting yielded a unified response to Iran's increasingly unpredictable behaviour, but the joint statement was vague about how countries would follow this up. Saudi Foreign Minister Faisal bin Farhan Al Saud emphasized his country's right to defend itself and hinted that Saudi Arabia and other Gulf states would act if necessary, adding that they have "very significant capacities and capabilities that they could bring to bear should they choose to do so".The Iranian leadership's response to these developments remains unclear, with New Supreme Leader Mojtaba Khamenei having not been seen in public since his appointment. The Islamic Revolutionary Guard Corps (IRGC) issued a statement saying that Iranian forces had responded to the "deceiving and lying enemy" that had targeted energy facilities in the country, and that they had "entered a new phase of warfare" to defend Iran's infrastructure.

In the final moments of January 29, 2024, five-year-old Hind Rajab’s desperate pleas for help were cut short as she remained trapped in a car surrounded by the bodies of six relatives. Despite obtaining clearance from the Israeli military, a Red Crescent ambulance dispatched to rescue the child was struck by tank fire, killing two paramedics and leaving the vehicle abandoned for over a week.Two years after the tragedy, the global campaign group Avaaz has released a report alleging that this incident was a deliberate 'double-tap' strike. This tactic, often used in warfare, involves a first attack followed by a second strike targeting civilians or emergency responders attempting to assist victims of the initial assault.The Avaaz analysis, shared exclusively with Al Jazeera, documents over 40 alleged human rights violations and argues that the attack contravenes international combat law, specifically the Geneva Conventions and the Rome Statute. The report suggests that the Israeli military possessed full situational awareness of the rescue mission but deliberately targeted the ambulance.Forensic evidence contradicts the Israeli military's initial claims that the family car was destroyed during an exchange of fire. Analysis by Forensic Architecture at Goldsmiths, University of London, found no evidence of combatants in the vicinity, only the presence of Israeli Merkava tanks. The report highlights that the ambulance was fired upon with 120mm tank rounds without warning, a finding supported by the Hind Rajab Foundation, which has identified 24 potential perpetrators.'I am absolutely convinced that this is another case of double tap,' said Sarah Andrew, legal director of Avaaz. 'The kind of weaponry used on the ambulance, the timing, and the fact that no warning was given – it immediately triggered a question in my mind.'The Avaaz brief urges the International Criminal Court (ICC) to investigate the matter. The group notes that more than 1,500 healthcare workers have been killed during the ongoing conflict in Gaza, raising serious concerns about the safety of medical personnel in the region.

At least two people have been killed in a tragic incident involving an Air Canada Express flight that struck a ground vehicle while landing at New York's LaGuardia Airport. The accident occurred on Sunday night, and the airport has been closed since then, with flights diverted to other airports. The aircraft, operated by Jazz Aviation, a regional partner of Air Canada, collided with a firefighting truck on Runway 4 at approximately 11:40 pm on Sunday (03:40 GMT on Monday). The vehicle was driving to respond to a separate incident. According to the Port Authority, 32 of the 41 injured individuals had been released by Monday, while nine remained hospitalized with serious injuries. The passengers and crew members on board Flight AC8646, which departed from Montreal, included 76 people, four of whom were crew members. The CRJ-900 aircraft struck the vehicle at a relatively low speed of 39 kilometers per hour (24 miles per hour). Emergency response protocols were immediately activated, and the US Federal Aviation Administration (FAA) issued a ground stop for all departures to LaGuardia. The National Transportation Safety Board has dispatched a 'go team' to investigate the collision. The incident has caused significant disruptions, with arriving planes being diverted to other airports or returning to their point of origin. New York's Emergency Management has warned of potential cancellations, road closures, traffic delays, and emergency personnel presence near the airport. LaGuardia Airport, which served 33.5 million passengers in 2024, has been experiencing flight disruptions due to poor weather and staffing impacts from a federal funding lapse.

Iran has reportedly claimed to have downed a US F-35 fighter jet during a combat mission, a development that could challenge the aircraft's reputation as 'unkillable'. According to sources familiar with the matter, the incident occurred last week when the F-35 made an emergency landing at an airbase in the Middle East. The Iranian Islamic Revolutionary Guard Corps issued a statement saying it had targeted a US aircraft, and Iran's semiofficial Tasnim news agency released military footage purporting to show Tehran's air defence systems hitting a US F-35 stealth fighter. The F-35, manufactured by Lockheed Martin, is considered the cornerstone of Washington's aerial firepower, boasting advanced stealth technology, sensors, and high-speed computing. Its ability to gather and share data from a 360-degree camera suite and other sensors makes it a formidable asset in modern warfare. If confirmed, this would be the first time an F-35 has been struck by Iran during the ongoing conflict. Defence experts emphasize that even if the claims are true, it does not necessarily mean stealth technology is becoming obsolete, but rather that even advanced aircraft like the F-35 are not invulnerable in a dense, adaptive air-defence environment. The incident is under investigation, with the US military's Central Command stating that the pilot was in stable condition after the emergency landing. The US has not yet confirmed that the F-35 was hit by Iranian fire, with President Donald Trump stating, “We’re flying wherever we want. Nobody is even shooting at us.” This development comes amid heightened tensions between the US and Iran, with at least 13 US service members killed and roughly 200 wounded during combat operations against Iran. In Iran, at least 1,444 people have been killed and 18,551 injured since the start of the conflict.

Iran has issued a stark warning to Gulf countries, threatening 'irreversible destruction' of their water infrastructure if the US follows through on its threat to attack Iran's electricity grid. This move has raised fears of a severe disruption to water supplies in the region, which heavily relies on desalination plants for drinking water.The Gulf countries, including Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Kuwait, and Oman, are highly dependent on these plants, with some countries relying on them for up to 90% of their water supply. For example, Kuwait gets 90% of its water from desalination plants, while Saudi Arabia relies on them for around 70%.Desalination plants are considered critical civilian infrastructure in the Gulf, as they turn seawater into drinking water through a process called reverse osmosis. These plants are situated on the coast, making them an easy target for an Iranian attack, and disabling them would have a significant impact on civilian populations and industries.Iran has already followed through on a similar threat in the past, targeting a desalination plant in Bahrain after one of its own plants was hit. Analysts have warned that any disruption to water infrastructure could trigger a major escalation in the conflict, given the potential economic and civilian impact.The impact of targeting desalination plants would be severe, with most Gulf countries only having water reserves to last around a week. If plants are struck and capacity is taken out, the impact would be quick and severe, potentially wiping out water supplies to major cities in a matter of days.