Examlex
Usually 4th order streams are more numerous than 1st order streams.
Teratogen
Any agent or factor that causes developmental abnormalities in an embryo or fetus.
Teratogens
Agents, such as chemicals or viruses, that can cause malformations or defects in an embryo or fetus.
Conception
Conception is the process of a sperm fertilizing an egg, leading to the beginning of pregnancy.
Syphilis
A sexually transmitted infection caused by the bacterium Treponema pallidum, characterized by distinct phases and potentially serious health consequences if left untreated.
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