“…Catarina Queirós, 1 Mafalda Casinhas Santos, 2 Rita Pimenta, 1 Cristina Tapadinhas, 1 Paulo Filipe 1,3 complex membranous substance comprising 80% water, 10% protein, and 10% lipids, which include barrier lipids such as ceramides, free fatty acids, phospholipids, and cholesterol, partly synthesised by fetal sebaceous glands during the last trimester of pregnancy. 5 In its composition there are also shed lanugo hair and desquamated cells.…”