Successful implantation of the zygote into the uterus is most likely eight to ten days after fertilization. If the zygote has not been implanted by day ten, implantation becomes increasingly unlikely in subsequent days.

A chemical pregnancy is a pregnancy that was detected by testing but ends in miscarriage before or around the time of the next expected period.

Chromosomal abnormalities are found in more than half of embryos miscarried in the first 13 weeks. Half

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