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Marijuana Use by Fathers Poses Risk for Miscarriage

HIGHLIGHTS FROM THE AMERICAN SOCIETY FOR REPRODUCTIVE MEDICINE’S 2019 SCIENTIFIC CONGRESS & EXPO                        

Note: Press room (PCC 203A) (phone number 215-418-2078) open Sun. October 13, 2pm-5pm EDT; Mon. October 14-Wed. October 16 8:00am-5:30pm EDT.

Philadelphia, PA – Research presented today at the 75th Scientific Congress of the American Society for Reproductive Medicine revealed that there is an association between marijuana use of the father and miscarriage. 

Using data from the Pregnancy Study Online (PRESTO) study over 1400 couples throughout North America were asked several questions, including about marijuana use. Baseline (pre-conception) data was collected with bimonthly follow up until conception and at various stages once a pregnancy was reported. About 10% of the men reported marijuana use. Not quite 19% of the couples reported a miscarriage. Adjusted Hazard Ratios (HR) for male marijuana use were 1.07 for men who consumed marijuana less than once a week and 2.04 for those who did so more than once a week.

“There have long been concerns about the impact of marijuana on sperm quality. As the legal landscape changes, it is important that we do more of this kind of research to help us counsel our patients,” said Harris M. Nagler, MD, President of the Society for Male Reproduction and Urology.

O-4 Harlow et al “Male Marijuana Use and Spontaneous Abortion”

Editor’s Note: This paper has been identified as a prize paper candidate for the meeting.


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