Do Low Thyroid Levels During Pregnancy Affect The Baby?

Yes I am very concerned My son s wife is 30 yrs. old and 3 mos. pregnant she have had pain in back and abdomen for 5 weeks and is on bed rest nausea and vomiting daily. We just got the news yesterday her TSH is .o2 this is her first pregnancy she is Filipino and they live in the Philippines. What are the dangers to her and the baby?