Age 18, 5.4ft, 9.2 stone, Protein S Deficiency (Strong family history of it) 1 previous miscarriage. Hi, i m 16 and a half weeks pregnant, been on clexane for around a month now for protein s deficiency but i ve been missing a few here and there just out of hate for them. Could you tell me all the risks there can be if I wasn t taking them please? Hopefully it will make me get over the fact I dislike them and encourage me to take them. Thanks.