Examlex
What are the two main chemical elements that make up the Sun? How much of the mass of the Sun is composed of elements other than these two?
Teratogens
Agents such as chemicals, viruses, and drugs, that can cause congenital abnormalities or developmental malformations in an embryo or fetus.
Lead Paint
A type of paint that contains lead, a toxic metal, which can cause serious health problems, especially in children if ingested or inhaled.
Fetus
A developing human from roughly eight weeks after conception to the moment of birth.
Premature Birth
The birth of a baby before the standard period of pregnancy is completed, typically before 37 weeks of gestation, which may lead to several health challenges for the infant.
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