In the third trimester of pregnancy (level of fT3 in pregnancy has been steadily declining since the first trimester and by the end of the third becomes most pronounced).
Ngo yokuthathu yesithathu yokukhulelwa (fT3 ezingeni ngesikhathi sokukhulelwa kancane kancane kunciphisa kusukela senyanga yokuqala futhi ekupheleni lwesithathu kuba evelele).