8. Menstruation and Fertility Disorders.
Thyroid conditions can affect the regularity of periods.
In hypothyroidism, periods might become heavier, more painful, and there may be less time between them.
In hyperthyroidism, it’s possible to have shorter periods with lighter flow, and even fewer or no periods at all. It also increases the risk of infertility, makes fertility treatment less successful, and increases the risk of miscarriage. The negative impact of an overactive thyroid on fertility has been proved in a study carried out by Jefferys et al. They found that 2.3% of women with fertility issues had hyperthyroidism compared to 1.5% of those in the general population. [5, 12]
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