Hi I'm 28 years old I have a thyroid surgery...

What are the effects of hyperthyroidism on pregnancy?
Maternal complications include miscarriage, pregnancy-induced high blood pressure, premature labor, placental abruption, heart failure and thyroid storm. Fetal and neonatal complications include miscarriage and low birth weight
How to monitor thyroid status during pregnancy?
If the TSH is low then hyperthyroidism should be modified under the supervision of an internist and endocrinologist,  TSH should be monitored every 4 weeks during the first 20 weeks of pregnancy, and then again between 26 and 32 weeks.
What is the normal change in the thyroid gland during pregnancy?
Gland size increases by 10% The production of the thyroid hormones T3 and T4 increases by about 50%. As a result, the level of normal thyroid stimulating hormone (TSH) during pregnancy is lower than the normal TSH level.
Recommendations for testing for thyroid disease during pregnancy
The new recommendations for TSH levels during pregnancy are the following:
First trimester of pregnancy: less than 2.5
Second trimester of pregnancy: 0.2-3.0
Third trimester of pregnancy: 0.3-3.0.