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Can Thyroid Hormones Affect A Woman’s Fertility?


What most women don’t know is that thyroid hormones interact with our reproductive hormones – such as oestrogen and progesterone – to maintain normal ovarian function and initiate egg maturation.

Put simply, an overactive or under-active thyroid can cause a disruption in the balance of our reproductive hormones. This, in turn, can result in fertility issues such as abnormal ovulation, irregular menstrual periods, difficulty conceiving, and difficulty carrying a pregnancy to term.

Leading feminine hygiene brand Always has long promoted women’s health. More importantly, the brand has long believed that knowledge is power. The reality is, to achieve optimal health, women need to be informed of certain facts, especially when it comes to their reproductive system.


In line with this, we have rounded up the top things that you need to know about your thyroid.

  1. Hyperthyroidism – an overproduction of thyroid hormones – is 10 times more common in women than men.
  2. Hypothyroidism is when the thyroid gland doesn’t produce sufficient thyroid hormones.
  3. Graves’ disease is an autoimmune disorder that causes hyperthyroidism. It can result in significant weight loss, which can decrease your chances of getting pregnant.
  4. If you have a family history of thyroid disorders or autoimmune diseases, then you have a higher risk of developing a thyroid problem.
  5. When your levels of thyroid hormones are very low, your thyroid-stimulating hormone (TSH) automatically increases to fill that gap. According to a recent study, elevated THS levels were found in 4.6% of women struggling with infertility.
  6. Symptoms of thyroid problems include fatigue, irritability and confusion, functional weakness, poor concentration, memory loss, weight gain, increased sensitivity to a cold environment, muscle or joint pain, dry skin and hair, and brittle nails.
  7. Thyroid problems can also lead to absent or irregular menstrual periods – as a result of abnormal ovulation.
  8. Thyroid issues can boost your levels of prolactin – the hormone responsible for milk production after delivery – and prevent ovulation.
  9. Your chances of having Polycystic Ovary Syndrome (PCOS) go up if you suffer from thyroid problems. PCOS affects your normal ovarian function and can hinder your ability to get pregnant.

Dr Eman Kasim

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