12 st weeks of pregnancy: the end of the first trimester

Reviewed by

EFELYA With more than 25 experienced practitioners.

At 12 weeks of pregnancy, the first trimester of pregnancy is over. Your foetus is about 90 millimetres long and weighs about 45 grams. Its face becomes more expressive: the ears are normally implanted, the eyebrows are visible. The fetus is still gaining mobility: it is capable at this stage of sucking its thumb for example. The genitals are now quite distinct. It will then be possible, during your ultrasound, to know the sex of your baby if you wish and if your baby is well positioned to facilitate the task of the ultrasound technician.