Vitamin C: Too Much of a Good Thing

Commonly in fertility diets vitamin C is mentioned, it's really good for you and aids in iron absorption and tissue repair. There is a point when too much vitamin C might actually interfere in female fertility. Men can take twice as much and it will help with semen factors but here are a few points about what too much does to impact female fertility.

Other things which can cause infertility include taking more than 1,000 mg of vitamin C a day. If a woman is doing this and trying to get pregnant, she should decrease it to 500 mg a day. Infertility caused by a higher dose should resolve within a few weeks.
From: Effective Holistic Treatment for Infertility

Vitamin C and bioflavinoids help strengthen the blood vessels lining the uterine wall. When C is too high, however, it can decrease the absorption of copper, a mineral necessary for ovulation, and increase the risk of both infertility and miscarriage.
From: Alternative Health Care Methods of Improving Fertility

Women should avoid megadoses of vitamin C because it can dry up cervical fluid, preventing sperm from reaching the egg. Limit the amount you take to the dose included in your prenatal vitamin.
From: Natural Ways to Boost Your Fertility