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Shaking during an earthquake can
Embryo
An early stage of development for multicellular organisms. In humans, it refers to the period from conception to the eighth week of pregnancy.
Acrosome
A cap-like structure over the head of a sperm cell that contains enzymes critical for egg penetration during fertilization.
Menstrual Period
A recurring cycle in women and female mammals involving the shedding of the uterine lining, typically lasting between 24-35 days.
Conception
The process of becoming pregnant involving fertilization or the implantation of an embryo in a female's uterus.
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