What effect does hypothyroidism have on pregnancy?
If hypothyroidism is left untreated after diagnosis, it poses a risk to both the mother and the fetus during pregnancy.
During the first three months of pregnancy, the fetus is entirely dependent on the mother's thyroid hormone. In the first three months, the baby's own thyroid hormones are not yet produced.
Hypothyroidism in the mother can have various effects on the mother, fetus, and child. The following are potential outcomes
Mother
High blood pressure, anemia, congestive heart failure, postpartum hemorrhage.
Fetus
Premature birth, stillbirth, developmental issues.
Baby
Low birth weight, lower IQ, incomplete growth.
As per the American Thyroid Association guidelines, the following are the TSH targets to maintain during pregnancy
- Planning Pregnancy ≤ 2.5 mIU/L
- 1 st Trimester ≤ 2.5 mIU/L
- 2nd & 3 rd Trimester ≤ 3 mIU/L
Although pregnant women should take the thyroxine dose as recommended, the thyroxine dose may need to be increased by up to 30% during pregnancy. Because, thyroxine hormone needs to be provided by the mother to the developing fetus.
If the thyroid levels are maintained properly before and throughout the pregnancy according to your qualified Endocrinologist, your pregnancy will be without any complications.