Slow fetal heart rate and growth and hashimoto's thyroid. Any correlation? I am 7.5 weeks and measure 6.5 weeks. Today's heart rate was 72.

Thyroid disease. If your TSH is normal and you are taking your thyroid meds as directed it shouldn't have an effect on the fetal heart rate. Unfortunately we do sometimes see a slow heart rate before a embryonic demise. You probably need a short term follow up ultrasound to recheck. At 45 your risk of miscarriage and fetal chromosome issues is much higher.

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