Abstract
Conclusions
1. Following embryectomy at 19-34 days of gestation in the rhesus monkey, viable trophoblast was present in 2 of 4 of the animals having a hysterectomy within the ensuing 5 weeks. 2. No viable trophoblast was found 5 months after the embryectomy in 3 monkeys treated with cortisone and a progestational agent. 3. The viable villi found in 2 of the 7 monkeys showed absence of vil-lous vasculature and occasional hydropic changes consistent with hydropic degeneration, but there was no evidence of trophoblastic proliferation. 4. No support is given to the hypothesis that early death (or removal) of the embryo is the etiologic factor in the development of the hydatidiform mole.
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