How long before a change in levothyroxine will change the TSH levels for Pregnant worman?

[Mabeline]

To: Dr. Lupo
Dear Dr. Lupo,
I have had hypothyroidism for 8 years. It has been stabilized for awhile and causing no problems. I am 37 and 6 weeks pregnant. I feel great in terms of energy and health but my TSH was 3.7 so my doctor changed the dosage from 112mcg to 137mcg. We're aiming to have the level at 2.0.  My question is how long before I should see changes in the TSH level? How long before it's worth testing again? Also, does the fetus only need my thyroid hormones at 11 weeks or is the baby negatively affected right now because my levels are too low? I am concerned about the research I have read about maternal hypothyroidism and fetal retardation.
When changes are made to your medication, how long in terms of weeks do you need before changing the dose?
I would appreciate any knowledge on this matter that you could share. Thank you,
Tessa

[Mabeline]

Thank you Lorna!
I am following your advice and I really appreciate your thoughts.
Tessa

[LORNA1301]

hi maybeline,

before i fell pregnant i was taking 100mg of thyroxine, and by the time i had my son i was taking 200mg, but i had my son at 7mths pregnant by section.

i dont mean to scare you but please go to your doctors or health visitors as much as you need to,  the night i had my son it was only instinct that told me to go to hospital, i was only in hospital over an hr and my son was born, my placenta had stopped working and if i had left it any longer he wouldnt be here today.

i read later that when you have a thyroid problem you should be monitored more than usual pregnancys.

just type in thyroid in pregnancy should give you loads of information,

i was told by docs that i was high risk of miscarriage untill i deliver, thats all they told me but like i said they didnt exactly help when i was pregnent.

please please do research on pregnancy with thyroid.

lorna.xx