Thyroid & Fertility: How Thyroid Affects Conception
Both underactive and overactive thyroid can impair fertility by disrupting ovulation and hormone balance. Even subclinical thyroid issues may affect conception and early pregnancy. Testing and optimizing thyroid function before trying to conceive is essential.
Thyroid and conception
Thyroid health directly affects your ability to conceive.
- Hypothyroidism: disrupts ovulation, causes luteal phase defects, and raises miscarriage risk.
- Hyperthyroidism: can cause light or absent periods and anovulation.
- Subclinical issues (borderline levels) may still affect fertility.
- Testing TSH and thyroid antibodies is standard fertility workup.
Know what your body needs, every day
PhaseBloom turns your cycle into a day-by-day plan for how to eat, move, rest, and care for your skin, so you stop guessing and start working with your hormones.
Know what your body needs, every day
PhaseBloom turns your cycle into a day-by-day plan for how to eat, move, rest, and care for your skin, so you stop guessing and start working with your hormones.
Frequently asked questions
Can thyroid problems cause infertility?
Yes. Both hypothyroidism and hyperthyroidism disrupt ovulation. Even mild or subclinical thyroid dysfunction can affect conception and early pregnancy.
Should I get my thyroid checked before trying to conceive?
Yes. Thyroid testing is part of standard preconception care. Optimizing thyroid levels before pregnancy protects fertility and reduces miscarriage risk.