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Does Coffee Impact Fertility? Exploring the Effects of Caffeine
It May Take Longer to Conceive With High Caffeine Intake
“The research is far from conclusive. But in women, very high caffeine intake, such as over 500 milligrams (mg) per day, has been linked to reduced fertility,” says Alex Robles, MD, a reproductive endocrinologist at Columbia University Irving Medical Center in New York City.
Caffeine May Affect Hormone Levels
Caffeine May Cause Problems With Embryo Attachment
Studies in both women and mice have found that higher amounts of caffeine may make it harder for a fertilized embryo to attach to the uterine wall, says Alexander Kotlyar, MD, a board-certified reproductive endocrinologist and infertility specialist at Genesis Fertility in the New York City area.
Caffeine May Raise the Risk of Miscarriage
“Some studies show that 200 to 300 mg [of caffeine] per day may be linked to a higher risk of miscarriage,” says Dr. Robles. That’s about two to three 8-ounce cups of brewed coffee per day.
Caffeine May Affect Sperm Health in Men
The research on caffeine and male fertility is mixed and much less clear than for women. “High caffeine intake has been linked to reduced sperm concentration and motility (how well sperm move), possibly affecting testosterone levels and overall sperm health in men,” says Sheeva Talebian, MD, a reproductive endocrinologist at CCRM Fertility of New York.
At least one study suggests that sperm problems may increase with higher doses of coffee, especially after more than three cups per day, says Kotlyar. “Such sperm issues also included damage to the DNA in sperm cells,” he adds.
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