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Pregnancy and Childbirth

Across
A period of three months
The use of high-frequency sound waves to show pictures of structures inside the body
Structure that joins the embryo or fetus with the placenta
Narrow outer end of the uterus
The period of development in the uterus from fertilization until birth; pregnancy
Down
An organ lining the uterus that surrounds the embryo or fetus
Fertilized egg after implantation
Process during which the fertilized egg plants itself in the lining of the uterus
Following birth
Unborn baby from eight weeks after fertilization until birth