check with your doctor re the IVF stuff first, since if the drugs have caused an abnormal result, then its not something you'd necessarily want to act on.

There are two main types of thyroid condition, over active and underactive.
DH has hypothyriodism with is underactive, and symptoms include hairloss, weight gain (and can include thrush)

this is from the Thyroid Australia website:

Hypothyroidism

Hypothyroidism (under active thyroid) is the most common thyroid disorder and usually strikes after age 40. It is more common on women than in men, and affects 6% to 10% of women over the age of 65. The signs and symptoms of an underactive thyroid are:
  • low energy
  • depression
  • slow heart rate
  • weight gain
  • cold intolerance
  • muscle fatigue
  • dry skin
  • hair loss
  • constipation
  • goitre
Hypothyroidism is diagnosed through a simple blood test. Synthetic thyroxine is a safe, effective and low-cost hormone replacement therapy. Dosing must be carefully monitored and the therapy must continue for life.
Synthetic thyroxine is one of the top three most commonly prescribed drugs in North America.
The most common cause of Hypothyroidism is an autoimmune condition called Hashimoto's Thyroiditis in which antibodies and white blood cells attack the thyroid.
(Information based on the Thyroid Foundation of Canada Thyrobulletin, Summer 1998, Vol 19, No. 2)

Hyperthyroidism

Hyperthyroidism (overactive thyroid) affects approximately 2% of women and 0.2% of men. The signs and symptoms of an overactive thyroid are:
  • irritability
  • rapid heart rate
  • weight loss
  • sleeplessness
  • heat intolerance
  • diarrhoea
Hyperthyroidism is diagnosed through a simple blood test. There are three main treatments for overactive thyroid - anti-thyroid drugs, radioiodine therapy and surgery. All are effective, though no treatment ever results in a complete cure.