Do irregular periods make you less likely to become pregnant?

Irregular periods are a sign that a woman is not ovulating, a condition known as anovulation, which is found in up to 40 percent of infertility cases, according to WebMD. Other conditions that hinder ovulation include thyroid diseases or problems with the adrenal or pituitary glands.

An irregular period is a cycle that is less than three weeks or more than five weeks long or one that drastically fluctuates in duration from cycle to cycle. According to About.com, it is normal to have an occasional irregular period due to an outside factor such as stress, but regularly having irregular periods may signal a problem.