conceptus

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conceptus

[kən′sep·təs]
(biology)
The product of a conception, including the embryo or fetus and extraembryonic membranes, at any stage of development from fertilization to birth.
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The antiestrogenic action of dioxin provokes periovulatory hormone variation and PrOO and leads to disproportionate rates of male-biased pathologic conceptuses outside the fertile window of the menstrual cycle.
On the basis of this PrOO hypothesis, we suggest that female experimental animals exposed to low doses of dioxin, when mated with unexposed males, will experience an increase of male-biased conceptuses and progeny, accompanied by loss of males.
This male-biased loss of conceptuses and individuals can evolve in sex ratio reversal, as shown by the overrepresentation of male blastocysts or births in rabbits after a short delay in fertilization and sex ratio reversal after a prolonged delay (19,20).