Daily Serum Choriogonadotropin Concentrations In Early Human Gestation

Fifteen regularly menstruating, healthy women were studied from day 10 of the menstrual cycle to either confirmation of pregnancy or spontaneous menses. Daily blood samples were obtained and serum luteinizing hormone (LH), human chorionic gonadotropin hormone (hCG), 17β-estradiol and progesterone were determined by means of specific radioimmunoassays (RIA). Two of the women experienced spontaneous conception with a rise in hCG on 12 and 13 days after LH peak. © 1984.222125129Braunstein, Grodin, Vaitukaitis, Secretory rates of human chorionic gonadotropin by normal trophoblast (1973) Am J Obstet Gynecol, 115 (4), p. 447Braunstein, Razor, Adler, Serum human chorionic gonadotropin levels throughout normal pregnancy (1976) Am. J. Obstet., 126 (6), p. 678Catt, Dufau, Vaitukaitis, Appearance of hCG in pregnancy plasma following the initiation of implantation of the blastocyst (1975) J Clin Endocrinol Metab, 40, p. 437Corker, Michie, Hobson, Hormonal patterns in conceptual cycles and early pregnancy (1976) Br J Obstet Gynaecol, 83, p. 489Faundes, Segal, Adejuwon, Brache, The menstrual cycle in women using an intrauterine device (1980) Fertil Steril, 34 (5), p. 427Greenwood, Hunter, Glover, The preparation of 125I-labelled human growth hormone of high specific activity (1963) Biochem J, 89, p. 114Jeppson, Rannevik, Thorell, Pituitary gonadotrophin secretion during the first weeks of pregnancy (1977) Acta Endocrinol, 85, p. 177Mishell, Jr., Nakamura, Crosignani, Serum gonadotropin and steroid patterns during the normal menstrual cycle (1971) Am J Obstet Gynecol, 111, p. 60Mishell, Jr, Thorneycroft, Serum gonadotropin and steroid patterns in early human gestation (1973) Am J Obstet Gynecol, 117 (5), p. 631Thorneycroft, Mishell, Jr, Stone, The relation of serum 17-hydroxyprogesterone and estradiol-17β levels during the human menstrual cycle (1971) Am J Obstet Gynecol, 111, p. 947Thorneycroft, Stone, Radioimmunoassay of serum progesterone in women receiving oral contraceptive steroids (1972) Contraception, 5, p. 129Vaitukaitis, Brannstein, Ross, A radioimmunoassay which specifically measures human chorionic gonadotropin in the presence of human luteinizing hormone (1972) Am J Obstet Gynecol, 113, p. 751Varma, Larrage, Selenkow, Radioimmunoassay of serum human chorionic gonadotropin during normal pregnancy (1971) Obstet Gynecol, 37 (1), p. 10Wide, Early diagnosis of pregnancy (1969) Lancet, 2, p. 86