There is also a notable uptick from 12.5 percent to 21.8 percent in the use of marijuana among pregnant Californian teens younger than 18, the researchers found.
The increase was especially sharp among young women, rising from 12.5 percent to almost 22 percent for mothers to be under the age of 24, in the years between 2009 and 2016. For pregnant teens under 18, marijuana use climbed from 12.5 percent to 21.8 percent.
Almost 300,000 pregnant women at facilities in Kaiser Permanente Northern California responded to a survey about their pot use, and also gave samples of urine for a toxicology analysis.
Participating women were asked to answer a questionnaire and go through a drug test to see if they tested positive for marijuana use.
Officials in Colorado, where recreational pot was legalized, have warned women not to smoke it during pregnancy, Gizmodo reported. The women were treated at Kaiser Permanente facilities that had screening for marijuana use as part of standard prenatal care.
Though little clear evidence exists on the effects of marijuana on developing human fetuses, animal studies have revealed that it may disrupt brain development.
"Marijuana is detectable in urine approximately 30 days after last use and this varies with heaviness of use and marijuana potency", she said.
But the study's author's wrote that "continued monitoring of trends, exposure timing, and offspring outcomes is important as marijuana potency rises in an increasingly permissive legal landscape".
In many states, medical marijuana can be prescribed for treating conditions including severe nausea and pain - both of which may affect pregnant women - but the American College of Obstetricians and Gynecologists recommends women stay away from weed if they want to have a baby.
California became the first US state to legalize medical marijuana in 1996.
"Think about marijuana use from [the study participants'] perspective, especially in Northern California", said Dr. Robyn Horsager-Boehrer, a professor of obstetrics and gynecology at the University of Texas, who was not involved in the study.
"Then there's the other group who take a more pragmatic view of pregnancy".
Right now, the film is expected to cross the $800 million mark today, which means that it would be more than halfway there. The big test will be the amount of force The Last Jedi shows between now and New Year's Day, as well as into January.
It also was the DOJ's Bruce Ohr whose wife, Nellie, was paid by Fusion GPS during the 2016 presidential campaign. Trump (@realDonaldTrump) December 23, 2017Wow, "FBI lawyer James Baker reassigned", according to @FoxNews .
We're sure the 33-year-old has the best medical care and wouldn't do anything to jeopardize her first pregnancy. Khloé Kardashian is loving her pregnant bod ! "For the ones who think they are physicians all of a sudden".
John Labrosse, the mayor of Hackensack, said the city is letting residents prepay the first two quarters of their 2018 taxes . But there's a new post-Xmas frenzy this year, focused not on malls or sports palaces, but on local tax offices.
For better crowd management, all stations will have Platform Screening Doors which are installed ahead of the Metro coach gates. Aditynath said that in the nine months of his rule, he was taking decisions without any partisan attitude or self interest.
Friday's resolution requires United Nations member states to repatriate North Korean overseas workers within 24 months. The country has increased its tests this year and while not all have been successful, the tests have raised tensions.
Here's hoping this gift exchange is an ongoing annual saga, 'cos there's a solid chance it would escalate pretty fucking quickly. She, just like thousands of others (myself included), gets her kicks from mind-numbing, voyeuristic and drama-filled reality TV.
The team also uses linebackers Kyle Van Noy , Trevor Reilly and Marquis Flowers at the end of the line, depending on the package. The Steelers released Harrison mostly as a procedural move to add another offensive lineman to their roster.
Interior Minister Anton Gerashchenko said Mr Yezhov had "worked for the Russian special services for at least two years". Mrs May attacked Russian Federation for "weaponising information" as she announced a UK-Poland defence treaty.
Patrick Mahomes to start at QB for Chiefs vs. Broncos
That gives Kansas City fans the chance to get their first sneak peek at Smith's heir apparent against the Broncos . A two-year started while at Texas Tech, he declared for the National Football League after his true junior season.
Thomas Fire containment reported at 86 percent
Fire officials in Southern California now consider the deadly Thomas Fire to be the second largest in the state's history. During that same period in 2016, the state firefighting agency reported 4,759 fires that burned 244,304 acres.
Three takeaways from Steelers' win over Texans
There does not appear to be another team in the AFC that could go into either Pittsburgh or Foxborough and win. Taylor Heinicke became the fourth quarterback to play for the Houston Texans this season after replacing T.J.
Dick Enberg Broadcast Legend Dead at 82
Legendary sports broadcaster Dick Enberg has died at age 82, passing away at his home in La Jolla, Calif. per multiple reports . He graduated from Central Michigan University and went to pursue Masters and Doctorate degrees from Indiana University.