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  • Title: Human chorionic gonadotropin levels in conception cycles after uterine and tubal embryo transfer.
    Author: Soltes B, Rawlins RG, Binor Z, Radwanska E.
    Journal: Fertil Steril; 1994 Oct; 62(4):823-5. PubMed ID: 7926094.
    Abstract:
    OBJECTIVE: To describe the rate of rise of beta-hCG levels in normal single gestations after uterine and tubal embryo transfer. DESIGN: A prospective study from 1991 through 1992 in which infertility patients who conceived after ovulation induction and ET were monitored with serum beta-hCG levels. SETTING: Infertility unit at Rush-Presbyterian-St. Luke's Medical Center in Chicago, Illinois. PATIENTS: Ninety-eight women conceived after ovarian stimulation and ET. This study included only patients who conceived after uterine ET (n = 12) and tubal ET (n = 25) and had an exponential rise of beta-hCG levels and sonographic evidence of an intrauterine gestation. RESULTS: The rate of rise of mean beta-hCG levels after ET preceded that of tubal ET by 24 hours until day 14 when the two approximate each other. CONCLUSION: There appears to be a unique interaction between the trophoblast and endometrial surface that may account for the early detection of beta-hCG after uterine versus tubal ET.
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