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[Changes in plasma progesterone levels in the female badger after removal of the pregnant uterus].

In the European badger Meles meles L., the progesterone profile during the gestational phase shows two successive periods. The first, corresponding to implantation could be due to pituitary stimulation and seems not to have any relation with embryos. The second seems to be due to the presence of the placenta. Indeed, after hysterectomy the levels of plasma progesterone are significantly lower.