The thyroid is an important endocrine gland located in the neck, below the Larynx. The gland is composed of two lobes and a connective tissue called the isthmus. The thyroid gland produces two key hormones: triiodothyronine (T3) and thyroxine (T4), which play vital roles in regulating metabolism and growth.
Dr. Sarada Mamilla, a renowned obstetrician and Best Doctor For Normal Delivery in Hyderabad, emphasizes the importance of monitoring thyroid function during pregnancy. These hormones play a crucial role in controlling metabolism, supporting growth, and aiding in the overall development of the body. It means the thyroid significantly affects the functioning of almost every organ in the body. Any imbalance of these hormones results in affected bodily functions.
When the thyroid gland produces less than the required amount of hormones, it leads to a condition called hypothyroidism. On the other hand, producing more than the required amount results in hyperthyroidism. These two conditions lead to numerous changes in bodily functions.
The levels of the thyroid hormones vary during pregnancy. These hormones are slightly elevated during the first trimester but return to normal in the later stages of pregnancy.
Thyroid hormones are essential for neural development in a fetus. Although the thyroid gland begins developing as early as the 3rd week of gestation, it does not become functionally active until around 18–20 weeks. Therefore, for its growth, the fetus relies on the mother's thyroid hormones, which are transported through the placenta.
Hypothyroidism causes numerous symptoms in the pregnant mother like pre-eclampsia, anemia, hypertension, placental abruption, fatigue, intolerance to cold, constipation, weight gain, swollen face, hoarseness, depression, muscle weakness, etc. Some of these can overlap with fibroid pregnancy symptoms, making diagnosis and treatment more complex.
Dr. Sarada Mamilla explains that if hypothyroidism is left untreated during pregnancy, it can cause irreversible effects on the fetus. The insufficient thyroid hormones cause impaired development of the brain, resulting in low IQ levels and psychomotor abilities, dwarfism, and low birth weight.
Hyperthyroidism in pregnant women is due to an autoimmune disorder called Graves' disease. In this autoimmune disorder, the immune system produces antibodies that stimulate the thyroid gland to release excessive amounts of thyroid hormone. It is also seen in a temporary condition called gestational transient thyrotoxicosis, where high levels of hCG (human chorionic gonadotropin) during early pregnancy stimulate the thyroid.
The hyperthyroidism could lead to symptoms like tachycardia, arrhythmia, unusual sweating, muscle weakness, and mood swings. Dr. Sarada Mamilla, the best doctor for high-risk pregnancy, emphasizes the critical importance of monitoring thyroid health during pregnancy. If left untreated, thyroid imbalances can lead to serious complications such as pre-eclampsia, pulmonary hypertension, placental abruption, heart failure, or even a life-threatening thyroid storm. It can also impact the fetus, increasing the risk of preterm birth, low birth weight, neonatal goiter, and, in severe cases, miscarriage or stillbirth.
If you are experiencing symptoms like unexplained fatigue, weight fluctuations, or an irregular heartbeat during pregnancy, don’t ignore them, they could be signs of a thyroid imbalance. Getting checked early makes a big difference. Early diagnosis and the right treatment are key to protecting both your health and your baby’s development.
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