21 terms

Beginning of life

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Fertilization
Fusion of an egg and sperm cell.
Conception
The moment at which a female becomes pregnant
Implantation
The process by which the zygote attaches to the uterine wall.
Zygote
A fertilized egg.
Embryo
An organism in the earliest stage of development.
Fetus
The developing human organism from 9 weeks after conception to birth.
Amniotic Sac
A fluid-filled sac that cushions and protects a developing embryo and fetus in the uterus.
Amniotic Fluid
Fluid within the amniotic sac that surrounds and protects the fetus.
Umbilical Cord
A cord that connects the mother's placenta to the fetus.
Placenta
A structure that allows an embryo to be nourished with the mother's blood supply.
Morula
Solid ball of cells
Blastocyst
Hollow ball of cells
Amnion
The innermost membrane that encloses the embryo.
Chorion
The outermost membrane surrounding the embryo or fetus.
Ectopic pregnancy
Pregnancy involving implantation outside the uterus.
Multiple pregnancy
A pregnancy involving more than one fetus.
Fraternal twins
Twins resulting from two fertilized eggs that develop simultaneously.
Infertility
An inability to conceive.
Birth control
The deliberate control of pregnancy or birth.
Contraceptive
Something designed to prevent a conception.
Identical twins
Twins resulting from one fertilized egg that divides in two.
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