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pubmed:otherAbstract |
PIP: 47 pubescent rats were inserted with IUDs and then impregnated. Ova were removed at 2, 3, 4, 5, and 6 days after impregnation and examined microscopically. The IUD failed to interrupt the processes of fertilization and of cleavage of the ova during their passage along the oviduct or the rate of passage. When a blastocyst entered the uterine cornu with an IUD, degenerative changes appeared leading to its death be fore the development of decidual transformations in the endometrial stroma.
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