Examlex
English-speaking children often stop counting at a number ending in nine because they don't know the next decade name.
Zygote
A zygote is the initial cell formed when a new organism is produced by sexual reproduction, following the fusion of male and female gametes.
Fetus
Developing human from about 9 weeks until birth.
Pregnancy
The condition of having a developing embryo or fetus in the body, typically in the womb, that results after fertilization of an egg by a sperm.
Midpiece
The segment of a spermatozoon between the head and the tail, containing mitochondria to power movement.
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