Concomitant secretion of Schwangerschaftsprotein 1 and human chorionic gonadotrophin following conception.
Daily measurements of serum oestradiol, progesterone, Schwangerschaftsprotein 1 (SP1) and hCG were made in 13 menstrual cycles during which conception occurred. The assays were continued until 21 d after ovulation. SP1 was detected in maternal blood 8-14 d after ovulation and hCG 9-13 d after ovulation. We conclude that these two proteins are secreted simultaneously but independently by the syncytiotrophoblast.
D006063:Chorionic Gonadotropin / Q000032:analysis / Q000378:metabolism*; D004958:Estradiol / Q000097:blood; D005260:Female; D006801:Humans; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000378:metabolism*; D011268:Pregnancy-Specific beta 1-Glycoproteins / Q000032:analysis / Q000378:metabolism*; D011374:Progesterone / Q000097:blood; D014327:Trophoblasts / Q000502:physiology*
D006063:Chorionic Gonadotropin; D011257:Pregnancy Proteins; D011268:Pregnancy-Specific beta 1-Glycoproteins; D011374:Progesterone; D004958:Estradiol