(09-11-15) Inverse link between male dietary trans fat intake and fertilization rate in couples undergoing ART

as presented at the annual meeting of the American Society for Reproductive Medicine
Higher male-partner intake of trans fat is associated with lower fertilization rates in couples undergoing assisted reproductive technology (ART), particularly in conventional insemination cycles, researchers have found. 
Mariel Arvizu, a doctoral candidate at the Harvard School of Public Health in Boston, Massachusetts, headed up a study that evaluated the association between dietary fat intake and the fertilization rate among couples undergoing ART. 
She described the findings at ASRM, held on October in Baltimore, Maryland.  Her team followed 141 men from couples presenting to an academic fertility center whose partners underwent a total of 246 ART cycles.  Diet was estimated before treatment with a validated food frequency questionnaire, and outcome data were extracted from medical records. 
Male subjects had a median age of 36.9 years, and their daily trans fat intake accounted for 32% of their total daily calories.  Fertilization rates were lowest in couples with the highest male partner intake of trans fats (median 1.20 % calories/day, IQR 1.21,1.46%). 
The multivariate-adjusted fertilization rates (95% CI) in couples in increasing tertiles of men’s trans fat intake were 77% (70-84%), 78% (72-84%) and 64% (55-72%) (P, linear trend = 0.05).  This association was stronger in cycles with conventional insemination, where the corresponding adjusted fertilization rates were 83% (69-91%), 70% (54-83%), and 47% (30-64%) (P, linear trend = 0.005), and less pronounced in intracytoplasmic sperm injection cycles (P, linear trend = 0.11).  
Before the present study, saturated and trans fat intake had been reported to be associated with lower sperm counts, however it had not been known whether this association resulted in lower reproductive success among couples undergoing infertility treatment, Arvizu said.

Source: quotivadis.it

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