Health
Fresh Embryos May Boost IVF Success for Women with Lower Fertility Odds, Study Finds
Women struggling with infertility and facing lower odds of success with in vitro fertilization (IVF) may have better chances of conceiving with fresh embryos rather than frozen ones, according to a new study from China.
The research, published in the BMJ, examined 838 women in their 30s who had a limited number of healthy eggs. It found that 40.1% of women who received fresh embryo transfers gave birth, compared to 31.5% of those who received frozen embryo transfers. Additionally, women who had fresh embryo transfers were more likely to get pregnant and less likely to suffer a miscarriage.
Rethinking the ‘Freeze-All’ Strategy
IVF, the most common fertility treatment worldwide, involves removing a woman’s eggs, fertilizing them with sperm in a lab, and transferring the resulting embryos back into the uterus. Many fertility doctors follow a “freeze-all” approach, where multiple embryos are collected and frozen for later use. This method is widely used to reduce potential risks associated with hormone stimulation and to allow the woman’s body to recover before implantation.
However, the new findings suggest that this strategy may not be the best option for women who already have lower chances of success. Factors such as age, underlying health conditions, low egg count, and poor egg quality all play a role in IVF outcomes, and fresh embryo transfers may improve results for these patients.
“A Crucial Clinical Question”
Dr. Daimin Wei, the study’s lead author and a professor at Shandong University’s Reproductive Medical Center, emphasized the significance of the findings.
“How to optimally use the ‘precious’ embryos to increase the chance of live birth in these patients is an important clinical question,” Wei told Euronews Health.
The study also found no difference in birth weight, neonatal health issues, or pregnancy complications between babies born from fresh or frozen embryos, further supporting the case for fresh transfers in specific patient groups.
Limitations and Future Research
This research is among the first to examine whether fresh or frozen embryos impact success rates in women with a poor prognosis. Most previous studies focused on women with normal or high chances of success, where frozen embryo transfers were found to be equally effective or even preferred.
The researchers acknowledged some limitations in their study, including differences in the number of embryos transferred and the developmental stage at which they were implanted. These factors could have contributed to the varying success rates between fresh and frozen transfers.
Additionally, male fertility and sperm quality were noted as contributing factors in about 17% of cases, reinforcing the need for a holistic approach to fertility treatments.
A More Personalized Approach to IVF
While fresh embryo transfers may not be the best option for all IVF patients, the study suggests that fertility doctors should consider individual patient characteristics when planning treatments.
“For clinicians, it is suggested to individually choose the embryo transfer strategy based on ovarian response and patient characteristics to optimize IVF outcomes,” Wei concluded.
The findings could help refine IVF protocols, offering more personalized fertility treatments and potentially improving success rates for those facing the greatest challenges in conceiving.
Health
World Cup Emotion Can Strain the Heart, Cardiologists Warn Fans at Risk
As the World Cup begins, medical experts are cautioning football fans with underlying heart conditions that the emotional intensity of matches can place unexpected strain on the cardiovascular system.
Cardiologists say that the excitement, tension, and anxiety generated during high-stakes games can trigger physical reactions similar to intense exercise, raising heart rate, blood pressure, and stress hormones.
“Intense emotions, whether positive or negative, can act as ‘precipitating risk factors’ for cardiovascular events such as heart attack,” said Paola Santalucia, a cardiologist and board member of the European Heart Network.
She explained that moments of extreme excitement, such as a decisive penalty shootout or a last-minute goal, may pose risks for people already living with heart disease. Those with additional risk factors, including hypertension, obesity, or smoking habits, are also advised to be cautious during emotionally charged matches.
Research using wearable devices has shown that during major football events, some fans experience heart rates climbing as high as 150 beats per minute. That level is comparable to sprinting and reflects how strongly the body reacts to emotional stress.
A study examining supporters during the 2025 German Cup final found that even watching from home can significantly affect physiological responses. “They still had an increase in heart rate that compares to walking, even though they didn’t walk,” said Christian Deutscher, professor of sports economics at Bielefeld University and co-author of the study.
He noted that the most intense reactions often occur not during goals themselves, but during moments of uncertainty such as VAR checks, penalty shootouts, or shots striking the post. These unpredictable situations, he said, are what drive the strongest emotional and physical responses among fans.
Deutscher also pointed out that stadium spectators may experience even greater strain due to environmental factors such as heat and alcohol consumption.
However, experts emphasize that football itself is not inherently dangerous. Instead, it is the body’s natural response to excitement that can create temporary stress.
“The adrenergic stimulation is at its max: extreme high blood pressure, high heart rate, and adrenaline, cortisol, skyrocketing,” said Dan Atar, professor of cardiology at Oslo University Hospital. In rare cases, he added, this surge can contribute to the rupture of arterial plaque in vulnerable individuals, potentially leading to a heart attack.
Atar stressed that such events can occur in everyday situations as well, including physical exertion like shoveling snow. “It is in no way dangerous to watch a football game,” he said. “All this is physiologic. It’s not dangerous to be excited.”
Still, he acknowledged that combining emotional stress with alcohol, heat, and pre-existing conditions can increase risk for some viewers.
Doctors advise those at higher risk to continue prescribed medications, limit alcohol intake, avoid smoking, and watch for warning signs such as chest pain or irregular heartbeat.
“The key message is not to avoid enjoying the match, but to do so with moderation and awareness,” Santalucia said.
Health
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Health
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