Hi, this is Dr. Srividhya . Regarding your question about planning for conception, I would suggest you to meet your endocrinologist
for better control of your hyperthyroidism
before pregnancy. If your doctor advises you radioactive iodine
then delay conception of atleast for 6 months. You need to understand that hyperthyroidism if not controlled before pregnancy is harmful for you and also your baby. It may by itself be the cause for infertility
. Do not discontinue your medication while you are trying for pregnancy (once your hormone levels are well controlled ), as these medications are safe in pregnancy.But once you are pregnant meet your endocrinologist to modify your drug and its dosage.
Severe and untreated hyperthyroidism is associated with menstrual irregularities and infertility(inhibition of ovulation). Those who do become pregnant have a significant increased rate of miscarriage
, intrauterine growth restriction (IUGR), premature labour and also higher risk of fetal mortality. For women with mild hyperthyroidism and those with good control by anti-thyroid drugs, the maternal and foetal outcomes are usually good and are unaffected by the disease.