alexa Artificially induced endometrial cycles and establishment of pregnancies in the absence of ovaries.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Navot D, Laufer N, Kopolovic J, Rabinowitz R, Birkenfeld A,

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Abstract In eight women with ovarian failure, we induced histologically normal endometrial function during a preparatory cycle consisting of sequential administration of estrogen and progesterone. During a subsequent cycle, endometrial stimulation was synchronized with surrogate-embryo transfer performed on days 16 to 21. Among the eight women, two pregnancies were established by embryo transfer on days 18 and 19. In both women, ovarian tissue was absent, and these patients therefore serve as an in vivo model for the isolated effects of estrogen and progesterone on implantation and maintenance of pregnancy. Treatment with exogenous estrogen was mandatory up to the 11th week of gestation, and treatment with progesterone until the 18th to 22nd weeks. We conclude that it is biologically feasible to simulate the essential hormonal and endometrial milieu of a fertile menstrual cycle and early gestation solely by the administration of estrogen and progesterone. Days 18 to 19 of the cycle are recommended for successful embryo implantation with this treatment program. This article was published in N Engl J Med and referenced in Journal of Addiction Research & Therapy

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