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The researchers analyzed concentrations of the mind-altering chemical THC and other compounds in the breast milk of 50 women who reported using marijuana. The women had children who ranged in age from newborns to toddlers older than 12 months.Between 2014 and 2017, the women provided 54 total breast milk samples, which were analyzed at the University of California, San Diego's Mommy's Milk lab, a human milk research biorepository. The women also reported in questionnaires whether they were exposed to marijuana, medications and other substances in the 14 days before their milk samples were collected.After analyzing the milk samples, the researchers found that THC was detectable in 34, or 63 percent, of the 54 samples. The average concentration of THC found in those samples was 9.47 nanograms per milliliter. The researchers also found five, or 9 percent, of the 54 samples had measurable concentrations of cannabidiol, another chemical in cannabis.The researchers then calculated how much THC an infant would ingest from that concentration.Taking into consideration breastfeeding frequency, quantity of milk ingested and other factors, the researchers estimated that a hypothetical 3-month-old, weighing 6.1 kilograms or 13 pounds, would ingest about 0.040 nanograms of THC per milliliter of milk."The question is, does it matter? ... Is it possible that even low levels in breast milk may have an effect on a child's neurodevelopment? And we don't know the answer to that," Chambers said.The study had some limitations, including that the researchers relied on the women to remember their marijuana use or exposure and then report that use. The researchers also did not test what levels of THC or other compounds were in the breastfed infants themselves, instead relying on their own estimates.However, Chambers said that more research is to come.The researchers are planning another study to better understand how cannabis exposure might be associated with neurobehavioral testing outcomes in children."That's a testable hypothesis and something that we want to move forward with trying to answer, because it's a critical question," Chambers said. 2159

The route on Sunday winds through Old Town, Mission Hills, Hillcrest and Balboa Park. A closing ceremony will take place Sunday at 4:30 p.m. at Waterfront Park in Downtown. 172

The VFW Imperial Beach, where O'Keefe's wife and two daughters volunteer, is taking donations and pet food for the family; anyone willing to donate can stop by the VFW Post 5477 office at 123 Palm Avenue. 204

The schedule outlined today by the district will give members of the Class of 2020 the assurance they need that they will graduate, whether or not public health officials approve a return to in-classroom instruction, Evans said in a statement. 243

The team announced the signing Monday night after Hosmer passed his physical. The first baseman, who spent his first seven major league seasons with Kansas City before becoming a free agent this offseason, can opt out of the deal after five years. 247