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Unmanaged hypothyroidism can affect one’s ability to conceive as well as possess serious risks to the health of the child. This article will cover all additional steps which are needed for healthy pregnancy.
Pregnancy is an exceptional period in any female’s life. Even though nearly 45% of all pregnancies in the U.S. remain unintended, more and more women decide to plan their maternity. In the medical world, this process is usually referred to as preconception.
This article will not cover typical check-ups recommended for all individuals planning to cancel their contraception to conceive a child. We aim to concentrate on the specifics of preconception in women with hypothyroidism only, reviewing all additional steps and processes they should go through to prepare for the healthiest pregnancy possible.
The best thyroid disease is the one under control before pregnancy.
Mother’s hypothyroidism (if unmanaged) is harming the baby directly as during the first few months of pregnancy the fetus requires maternal thyroid hormones for normal nervous system development. Later, the baby will start producing the needed hormones themselves; however, the early-term thyroid hormone deficiency outcomes can not be reversed.
Early studies demonstrated that children born to mothers with uncompensated hypothyroidism during pregnancy had lower IQ, an increased risk of disabling cerebral palsy, and impaired psychomotor development. We know that these possibilities sound terrifying but do not panic – if properly treated and controlled, women with hypothyroidism can have healthy, unaffected babies.
2. RISK OF INFERTILITY
Another important issue is that hypothyroidism may increase the risk of infertility. Even though this topic requires more high-quality studies, most evidence appears to support an association between overt thyroid dysfunction and an increased risk of infertility.
3. DIFFICULTIES WITH DISEASE DIAGNOSTICS
The last but not least important reason to address any thyroid-related symptoms before getting pregnant is that many thyroid disease symptoms such as fatigue, low concentration, constipation, and abnormal sensation may be mistaken for the signs of a normal pregnancy and, thus, delay needed diagnostics and treatment.
Who needs to be tested for hypothyroidism?
According to the 2017 Guidelines of the American Thyroid Association for the Diagnosis and Management of Thyroid Disease During Pregnancy and the Postpartum, routine thyroid laboratory tests are not recommended for all women planning a pregnancy. However, all females which arrived for preconception consultation or their first pregnancy appointment should undergo a clinical evaluation. If any of the following risk factors are identified, testing for serum thyroid-stimulating hormone (TSH) is recommended:
According to this guideline, when a suppressed serum TSH is detected in the first trimester of pregnancy, a medical history, physical examination, and measurement of maternal serum FT4 or TT4 concentrations should be performed. Measurement of TRAb and maternal TT3 may prove helpful in clarifying the etiology of thyrotoxicosis.
I have been diagnosed with hypothyroidism….now what?
First of all, it is essential to define the reason behind hypothyroidism before pregnancy because specific diagnostic tests (i.e., radioactive thyroid scan) and treatments (i.e., radioactive iodine ablation of the thyroid) are not safe for pregnant women.
The further strategy depends on your particular medical condition; in this article, we will only cover overt hypothyroidism. If detected before pregnancy, levothyroxine dose should be titrated to achieve a TSH level of 2.5 uU/ml or below before pregnancy. Also, be prepared that your doctor may decide to increase your thyroid medication dosage by 30-50% through the pregnancy and likely as soon as your pregnancy is confirmed.
Women with overt and subclinical hypothyroidism or those at risk for hypothyroidism should be monitored with a serum TSH measurement approximately every four weeks until midgestation and at least once near 30 weeks gestation.
Will I need any other tests?
American Thyroid Association does not recommend any additional maternal or fetal testing (such as serial fetal ultrasounds, antenatal testing, and/or umbilical blood sampling) beyond the measurement of maternal thyroid function unless needed due to other circumstances of pregnancy. This recommendation does not apply to women with Graves’ disease effectively treated with 131I ablation or surgical resection, who require TSH receptor antibody (TRAb) monitoring.
If you want to dig deeper than standard patient-oriented guidelines, we recommend that you take time and read the Committee Opinion of the American College of Obstetricians and Gynecologists (ACOG) and the American Society Reproductive Medicine (ASRM). This source will help you to understand the basics of the pregnancy planning process from the perspective of the doctor.
You can view app features on www.thyforlife.com and download ThyForLife’s thyroid tracking app in the Google Play Store at: https://play.google.com/store/apps/details?id=com.thyforlife.android&hl=en.
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