16 W – AVOID OR ATTACK NEEDLES FROM AMNIOCENTESIS;
•20 W – TWINS LOCATE EACH OTHER WHITHOUT DIFFICULTY, TOUCH EACH OTHER’S FACES, OR GIVE EACH OTHER’S HANDS;
* BEFORE 26 W – LIGHT SENSITIVITY
* 26 W – OPENING OF THE EYELIDS;
* 31 - 32 W – VISUAL FOCUS AND FOLLOW-UP VERTICAL AND HORIZONTAL.