The latest in fertility
Fertility research, written in plain English.
To-the-point summaries of the latest peer-reviewed research on fertility, IVF, and reproductive health.
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The latest in fertility
To-the-point summaries of the latest peer-reviewed research on fertility, IVF, and reproductive health.
Loading articles…
The latest in fertility
To-the-point summaries of the latest peer-reviewed research on fertility, IVF, and reproductive health.
Only about one in three women diagnosed with premature ovarian insufficiency in Saudi Arabia received hormone therapy, even when they already showed signs of bone loss. This gap points to systemic barriers including a lack of national treatment guidelines and gaps in physician training.
Even in states that require insurers to cover sperm freezing for cancer patients, only about 61% of clinics accept that insurance, compared to 28% in states without such laws. Patients who do try to use their coverage often face delays from prior authorization requirements, low reimbursement rates that discourage clinics from participating, and a lack of clear information about costs.
A single injection of denosumab, a bone-related drug, did not improve blood sugar or cholesterol levels in young infertile men compared to a placebo. However, the drug did slightly raise a liver enzyme called ALT, and a small subgroup of men with high stress hormone levels did show a modest blood sugar reduction.
Women who previously used a hormonal IUD were nearly four times more likely to have a uterine lining too thin for embryo implantation when starting fertility treatment, compared to women without prior IUD use. This thinning appeared to persist across multiple treatment cycles, affecting 64% of prior hormonal IUD users versus only 10% of women without prior IUD use.
Researchers found 50 proteins that behave differently in the fluid surrounding eggs of women with poor ovarian response compared to women with normal ovarian reserve, and two of these proteins stood out as possible markers of the condition. Identifying these proteins could eventually lead to better ways to predict or treat poor ovarian response during fertility treatment.
Despite widespread enthusiasm, none of the major automated lab technologies used in IVF — including AI embryo selection, automated egg freezing, and robotic sperm injection — have been shown in rigorous trials to improve pregnancy or live birth rates compared to skilled human embryologists. The most striking finding is that the only randomized trial of AI-based embryo selection actually failed to show it was even as good as standard human grading for clinical pregnancy.
A man whose blood cells showed a female genetic pattern (XX) was still able to father a child, because his sperm carried the male (Y) chromosome that his blood cells lacked. After fertility treatment, his partner achieved a healthy pregnancy, showing that this rare genetic mix does not always mean infertility.
In women with deep endometriosis, anywhere from 15% to 50% may have disease that has spread to the urinary tract, most often the bladder. This can cause symptoms like painful urination and frequent urges to urinate, and imaging specialists sometimes confuse it with cancer, which can delay the right treatment.
Women with PCOS generally had low adherence to the Mediterranean diet, and those who followed it more closely tended to have slightly lower body weight and inflammation markers. However, all of these links were weak, meaning the Mediterranean diet alone is unlikely to explain large differences in health outcomes for women with PCOS.
A mutation in a gene responsible for repairing broken DNA was found running through three generations of a family where multiple women experienced premature ovarian insufficiency, a condition where the ovaries stop working normally before age 40. Lab experiments showed that this faulty gene reduced cell survival, impaired DNA repair, and triggered premature cell aging in ovarian cells.
Women who had a ruptured ovarian endometriosis cyst operated on by an endometriosis specialist had a noticeably lower recurrence rate over 10 years compared to those treated by non-specialists, though pregnancy rates were the same in both groups. The specialist group showed roughly half the recurrence risk, but this difference just missed the threshold for statistical certainty after accounting for other factors.
Women who experienced four or more types of childhood adversity were 64% more likely to have been diagnosed with PCOS compared to women with no such experiences. Sexual abuse showed the strongest link, nearly doubling the likelihood of a PCOS diagnosis.
Natural plant-based compounds called polyphenols show promise for reducing inflammation, pain, and tissue growth linked to endometriosis in laboratory and animal studies. However, most of the evidence comes from animal models and lab experiments, and very few human clinical trials have been done yet.
Researchers found a new variant in a gene called FIGLA that appears to disrupt how genetic instructions are processed in cells, possibly causing premature ovarian insufficiency, a condition where the ovaries stop working normally before age 40. This finding was identified in a single Chinese family and confirmed through laboratory testing that showed the variant causes errors in how the gene's message is read.
Eggs that stay connected to their surrounding support cells are much better at pausing their development when DNA damage is detected, while eggs stripped of those cells keep dividing even when carrying similar levels of damage. This protective pause depends on a checkpoint system inside the egg that the support cells appear to switch on through direct cell-to-cell communication.
Even before starting hormone therapy, fewer than half of transgender women assigned male at birth had normal sperm quality, compared to about three-quarters of non-transgender men. Those who had previously used hormone therapy and then stopped showed a trend toward even poorer sperm quality, though the difference was not statistically significant.
Among women in their 30s being treated for infertility, routine breast ultrasound detected breast cancer in about 3 out of every 1,000 women screened, which is consistent with rates seen in other breast screening studies. Reassuringly, nearly 9 out of 10 women who were called back for a closer look were still able to continue their fertility treatment during the follow-up process.
When an IVF cycle is canceled because follicles grow unevenly, switching to a different stimulation approach in the next cycle led to significantly better follicle coordination than repeating the same approach. In the analysis, patients who switched protocols showed more than twice the improvement in follicle maturity compared to those who stuck with the original plan.
In a study of 50 couples with unexplained or hard-to-treat infertility, genetic testing found a likely disease-causing genetic change in 78% of them, helping doctors predict whether the couple could still have a biological child. For the remaining 22%, a genetic change was found but its significance was uncertain, meaning results had to be interpreted carefully.
For overweight and obese women going through IVF, using higher medication doses per mature egg retrieved actually raised the chance of failure rather than helping, and a specific gentler stimulation approach called PPOS was linked to nearly half the risk of repeated failure compared to mild stimulation. Women who also transferred embryos at the blastocyst stage had similarly lower odds of continued failure, suggesting that adjusting the treatment plan after an initial setback can meaningfully change outcomes.
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