19 st week of pregnancy: the sense of touch becomes more refined

This is the stage for the second trimester ultrasound: between 21 and 23 weeks, which checks that all the organs in place are developing well. Your foetus is now completely covered with fine down, called lanugo, which helps to maintain the protective layer of vernix caseosa. The sucking reflex is increasing, which may cause the fetus to suck its thumb more regularly. Its sense of touch is becoming more refined...