Week 35: Baby's skin is pink and smooth Week 37: Baby might turn head first Content Week 28: Baby's eyes partially open Week 29: Baby kicks and stretches Week 30: Baby's hair grows Week 31: Baby's rapid weight gain begins Week 32: Baby practices breathing Week 33: Baby detects light Week 34: Baby's fingernails grow Week 35: Baby's skin is smooth Week 36: Baby takes up most of the amniotic sac Week 37: Baby might turn head down Week 38: Baby's toenails grow Week 39: Baby's chest is prominent Week 40: Your due date arrives