A human in vivo model for the luteoplacental shift

Richard T. Scott; Daniel Navot; Hung-Ching Liu; Zev Rosenwaks

doi:10.1016/s0015-0282(16)54544-0

A human in vivo model for the luteoplacental shift

Richard T. Scott, Daniel Navot, Hung-Ching Liu, Zev Rosenwaks

In: Fertility and Sterility · 1991 · vol. 56(3) , pp. 481–484 · doi:10.1016/s0015-0282(16)54544-0 · PMID:1894025 · W2336883393

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This paper presents a human in vivo model to study the luteoplacental shift, a crucial transition in pregnancy.

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Abstract

ObjectiveTo study the onset of early placental steroidogenesis in humans.DesignOvarian failure patients who were administered a constant dosage of exogenous estradiol (E2) and progesterone (P) during the luteal phase and early gestation and who conceived after transfer of donated oocytes were used to assess serum hormonal changes throughout early pregnancy.SettingHormonally replaced ovarian failure patients undergoing an egg donation program in an academic research environment.Patients, participantsNine human volunteers desiring egg donation.InterventionsReplacement of E2 and P.Main outcome measureSerum E2 and P concentrations were measured weekly throughout the patients' gestations.ResultsSerum E2 and P levels of these patients remained low in early gestation but significantly increased 25 +/- 1.6 and 34 +/- 1.6 days post embryo transfer, respectively. Regression lines of E2 (r = 0.99; P less than 0.01) and P (r = 0.95; P less than 0.005), intersected basal hormonal levels approximately 3 weeks after transfer.ConclusionThis estimate of the onset of placental steroidogenesis is equal to the 5th gestational week as calculated by the patients' last menses, approximately 3 weeks earlier than previously reported.

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Cites (1)

Effects of luteectomy and progesterone replacement therapy in early pregnant patients 1973

Cited by (1)

Nitric oxide induces extensive apoptosis in endometrial epithelial cells in the presence of progesterone: involvement of mitogen-activated protein kinase pathways 2001

References (12)

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Cited by (1)

Nitric oxide induces extensive apoptosis in endometrial epithelial cells in the presence of progesterone: involvement of mitogen-activated protein kinase pathways 2001

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[1] Effects of luteectomy and progesterone replacement therapy in early pregnant patients 1973