 [ Symptoms ] what can i expect during week 12 of my pregnancy [ Disease ] baby  the fetus now measures about 2 5 inches from crown to rump and weighs between three tenths of an ounce and half an ounce it is fully formed from tooth buds to toenails and your baby is job now is to continue getting larger and stronger for the rest of your pregnancy with the most critical development behind the fetus the chance of miscarriage drops considerably after this week mom to be  nausea and energy start to improve you may be experiencing occasional headaches dizziness and fatigue from hormonal changes if it is your first baby you still could be wearing loose fitting clothes but if you have had other pregnancies you will probably start to show earlier and may be in maternity clothes the typical weight gain by now is about three to five pounds fathers to be might also experience pregnancy symptoms called couvade or hatching  during the third month and at delivery including nausea abdominal pain appetite changes and weight gain tip of the week  most women develop stretch marks on their abdomen breasts hips or buttocks sometime during their pregnancy they will not go away but they will usually fade after pregnancy despite claims from manufacturers creams and oils do not minimize them it depends on your skin is natural elasticity gradual rather than rapid weight gain may help as well as avoiding excessive weight gain during pregnancy