Researchers analysed thousands of laboratory-made plasmids and discovered that nearly half of them had defects, raising questions of experimental reproducibility.
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Since March, fertility clinics across the country have halted treatments for tens of thousands of people because of Covid-19, forcing patients to suspend their family planning. In recent days, some clinics have reopened, resuming services and procedures despite ongoing coronavirus concerns.
But shifting guidelines and minimal oversight have left clinics to decide for themselves when and how to resume in vitro fertilization, or I.V.F. At clinics where I.V.F. is ramping back up, or never slowed at all, some staff members are concerned about a lack of adequate protective equipment and safety policies.
On April 24, the American Society for Reproductive Medicine issued recommendations for restarting operations, leaving it up to individual clinics to determine how to proceed. The professional society had previously advised fertility clinics to avoid starting new treatments, postpone nonemergency surgeries and shift to telemedicine.
The shutdown generated a flurry of media attention and pushbackfrom fertility doctors and patients. Most clinics paused starting new I.V.F. cycles, which are highly time-sensitive. But a few remained open, even operating at full capacity, causing the industry to debate when...